They're driven entrepreneurs and they're big on investing in bitcoins, and they think Hong Kong will become the bitcoin capital of the world, despite setbacks including restrictions on bitcoin trading on the Mainland.

At this guzheng academy in North Point in the eastern part of Hong Kong Island, bitcoins are accepted here. The digital currency is music to the ears of owner Zou Lunlun �C who first learned about bitcoins in 2009 from her students in Silicon Valley. She says her customer base grew since she started accepting bitcoins since last September.

"Start from 15 percent to 20 percent, now 30 percent of my customers now use bitcoin to pay. Bitcoin is quick and not fake and you don't worry about the weekends, holidays, it's just like sending email, very convenient to me." Zou Lunlun, Owner of Zou Lunlun Guzheng Academy said.

Over in the northwestern part of New Territories in Hong Kong, Laser Yuan lays claim to creating Hong Kong's first bitcoin trading platform.

How long did it take for you to make this system?

"About half a year. BitCashOut was set up one year ago." Phd. Laser Yuan, CEO of YT E-commerce Limited said.

A doctorate degree holder in financial engineering, this 36 year-old native of Hubei on the Mainland gave up his desk job to start his bitcoin career in his own apartment. He rented a cloud system to store data in the U-S. His online Bitcoin exchange now boasts of more than one-thousand members.

"It's in four currencies: in Hong Kong dollar, Chinese yuan, USD and euro, and you can see the last price it's been traded, what price people are asking." Phd. Laser Yuan said.

So if for instance I wanted to put an amount here of say maybe 1.1?

"You will get 7,000 Hong Kong dollas." Phd. Laser Yuan said.

So 7,000 Hong Kong dollars, for the amount of 1.1 bitcoins?

"Yes, yes." Phd. Laser Yuan said.

Right now, there's a lot of opposition. The Mainland authorities are restricting its use. Even the Hong Kong Monetary Authority says don't use it. And even Alibaba is restricting it from its platform.

"I think government will take some time to learn about bitcoin. Everytime it will bring us lots of benefits, it's the same for bitcoins." Phd. Laser Yuan said.

Mr. Yuen has collected around 20 bitcoins so far, and he keeps them in several places �C including his "online wallet" and in online exchanges such as the one he runs, BitCashOut-dot-com. He looks forward to the day bitcoin investors could do their transactions off-line �C on automated teller machines like this one, the maker of the world's first bitcoin ATM. Its first machine is now up and running Canada.

Imagine ATMs like these that don't spew out money -- but bitcoins. It's what Hong Kong residents could see by the end of this month as the American company behind the world's first cash machine for bitcoins installs its first teller machine here, after Vancouver, in the lead-up to the Lunar New Year holidays.

Mr Yuen foresees the day bitcoins replace the existing currency as the mode of payment �C for anything from basic goods to discretionary purchases. Ms Zou though doesn't quite think so. While convinced bitcoins will become more and more popular, the digital currency she believes will end up co-existing alongside the Hong Kong dollar.

Either way, bitcoins have been a disruptive force in the currency markets, and it's changing the way people think about how they earn, spend and invest in this digital world.