Cameron and Tyler Winklevoss. REUTERS/Lucas Jackson Interviewing the Winklevoss twins presents a unique problem: In retrospect, it can be extremely difficult to work out who said what.

In person, the 6-foot-5, 33-year-old, Olympic-rowers-turned-technology-entrepreneurs are just about distinguishable. But when speaking over a crackling, transatlantic Skype line, they are nearly impossible to tell apart.

The twins are gearing up for the launch of their latest project, a super-secure Bitcoin exchange called "Gemini," which they announced at the end of January. Created in 2008 by the anonymous Satoshi Nakamoto, Bitcoin is a decentralised digital currency that does away with central banks in favour of user-to-user transactions. Tyler and Cameron became involved in the sphere since first learning about it in 2012 (while partying in Ibiza, they say); they claim to own at least 1% of all Bitcoin in existence, and they have also invested heavily in the cryptocurrency ecosystem.

Bitcoin is like a "child taking its first steps," Tyler says, and the arrival of "mature financial tools" won't "happen overnight." But Gemini is intended to be one of the first of these.

Gemini will be a fully regulated exchange through which ordinary members of the public — and institutions — can feel confident enough to buy and sell the digital currency without fear. Right now the world of Bitcoin is like the Wild West — exchanges come and go, often disappearing with everyone's money inside them. Gemini will be the antidote to that, the twins hope. They are touting it as the "Nasdaq of Bitcoin."

They believe the digital currency — and institutions like Gemini — will one day dominate global finance.

It's an ambitious project, and it comes amid serious teething trouble for Bitcoin.

A 'difficult, awkward stage for Bitcoin'

Bitcoin had a bad start to 2015. It crashed hard, losing 30% of its value in less than a week. It dropped as low as $173 — down from $350 just a month prior and far below its peaks of over $1,000 at the start of 2014. The Winklevosses say they "can't guarantee the price won't go lower" but believe the prices represent a "buying opportunity right now."

The price is slowly crawling back — as of writing it hovers around the $290 mark. But the drop also spooked confidence in the digital currency and forced at least one Bitcoin business to halt operations because it was no longer profitable.

Hong Kong, site of the alleged MyCoin ponzi scam. Sean Pavone / Shutterstock There has been other bad news too. Earlier in January, the UK exchange Bitstamp was hacked and $5 million worth of the virtual currency was stolen. And just weeks later, the Chinese exchange BTER reported a hack, offering up a $168,000 ransom to whoever could track down its $1.75 million worth of stolen Bitcoins. (The Hong Kong exchange MyCoin also recently closed with at least $8.1 million in investors' funds missing, but the nature of the crime appears to be closer to an old-fashion Ponzi/pyramid scheme, rather than a sophisticated hack attack.) The slew of bad news brings back uncomfortable memories of the infamous exchange Mt. Gox. Responsible at its peak for 70% of all Bitcoin transactions, it shuttered in February 2014 with $450 million in Bitcoin (at then-current prices) missing.

This is, in the twins' eyes, a "difficult, awkward stage" — but they also "don't see how it gets much more awkward." There "is no market in America right now," they assert, and that's soon to change.

Investors seem to be taking a similar, unperturbed view of the cryptocurrency. The Bitcoin startup Coinbase announced it had raised $75 million in a Series C funding round just days after the crash at a rumoured $400 million valuation — the highest ever for the industry. The company has gone on to launch its own digital currency exchange that will compete with Gemini — though Coinbase denies the timing of its launch was motivated by the Winklevosses' plans to launch later in 2015. "[The] launch time was not influenced by the Winklevoss announcement," CEO Brian Armstrong said. "Coinbase is launching the exchange simply because it is ready."

The launch of BIT, a Bitcoin trust in which anyone can buy shares, has been hailed as another piece of good news. Previously, only government-accredited investors could invest in such funds. As the "first publicly traded bitcoin investment fund," Brian Kelley writes for CNBC, it "could pave the way for more stability in the price."

Criminal, untrustworthy, useless: Public perceptions of Bitcoin aren't great

An array of digital currency organisations have hired an "avante garde" advertising agency, The Wall Street Journal reports, with the intention of giving Bitcoin a PR makeover. So far, however, the news of positive developments in the ecosystem is not filtering through to ordinary people.

According to research from Coin Center, 65.6% of the general American public "are not familiar at all with Bitcoin," and just 4.7% have actually used it themselves. Of those who are aware of Bitcoin, perceptions consistently skew toward the negative. People are mistrustful. They feel it has little use. They believe it is more likely to be used by criminals.

The Winklevosses "expect to be targeted" by hackers — but they're prepared

Despite these negative public perceptions, the Winklevosses remain optimistic, saying, "America hasn't really come online yet" but this won't "persist forever." Within a few months, they argue, it will be a very different story. "There's much more interesting startups and initiatives that are going to come online in the next six months that are positive for price." As the price rises and the ecosystem develops, perceptions will shift.

I spoke recently with Nicholas Cary, cofounder of the Bitcoin startup Blockchain, and he echoed this. Venture capital is pouring into the ecosystem, he says, and there's a "latency" before "you'll see the outcomes."

Cameron and Tyler believe Gemini will be instrumental in that change. Their exchange aims to differentiate itself through its security credentials, with its blog saying the twins have aimed to "bring together the nation's top security experts, technologists, and financial engineers to build a world-class exchange from the ground up with a security-first mentality." The plan is to launch early in 2015 (contingent on getting the necessary regulatory approvals), and they say they fully "expect to be targeted" after Gemini opens its doors — but also that they are "learning from mistakes of the past."

The exchange is also partnering with a major, yet-to-be announced US bank.

Pictured: The state of Bitcoin? Soupmeister/Flickr (CC) An analogy for the current state of Bitcoin often used by enthusiasts — and brought up by Cameron and Tyler when I spoke to them — is the early internet. "When email first came out I don't think there was a compelling argument to say you need to use this to make your life better," they say. "It's really up to the entrepreneurs and the technologists to build the infrastructure and applications out so that it's super easy — and dummy-proof, so to speak — to use."

While some Bitcoin evangelists describe a future in which the technology totally supersedes traditional currency, the Winklevosses are more cautious. They "don't think the Bitcoin will replace the dollar."

Their vision of a mature Bitcoin frames it as more similar to a "large blue chip stock" — volatility all but eliminated, more liquidity in the market, with a dramatically increased market cap. The construction of basic infrastructure like regulated exchanges is framed as an essential stepping stone in the process.

"There will be a future where people will use Bitcoin," the twins say, "and they won't even know they're using it. At that point it's everywhere — it's a part of global finance, it's a part of our everyday lives. In the same way using email was very difficult and the edge of technology ... it's always difficult, it's problematic, it's painful to use, and we're at that point in Bitcoin right now. The point where we're beyond it is the point where people don't think of email as the bleeding edge of tech because it works so well everyone uses it … I think it's going to get to that point.

"We'll be in a situation where the majority value transferred around the world will use the Bitcoin protocol."

'A stagnating marketplace ... in an environment of regulatory and political uncertainty'

Tyler Winklevoss: Bitcoin is a "marathon." REUTERSEduardo Munoz In a subsequent email, I ask Tyler about a recent report put out by Juniper Research. The organisation predicts a wilderness year for digital currencies, with the value of transactions across all cryptocurrencies dropping to $30 billion in 2015 — down from $71 billion in 2014. It pins this fall on "the combined impact of exchange collapses, Bitcoin theft, and regulatory concerns around cryptocurrency's role in funding dark web purchases."

It's a statement that was echoed two weeks later when exchange Netagio closed its doors, citing "the reality of a stagnating marketplace in Europe, in an environment of regulatory and political uncertainty facing bitcoin businesses."

"Judging a child taking his first steps for not being able to run a marathon is shortsighted," Tyler responds. "In its current stage, Bitcoin isn't ready for mass adoption. But people have invested half a billion dollars into the space in the last 14 months because they realise the potential for Bitcoin to not only compete in that marathon, but to actually change the way it is run."