Bitcoin and other virtual currencies are worth the same now that they were a week ago, before bad news headlines, hints at possible government or regulatory intervention and more dramatically changed market conditions.

Oh, in practice that’s not right. The prices for all cryptocurrencies went tumbling this week with the evaporation of Mt. Gox; the largest bitcoin exchange vanished amid swirling troubles, acknowledging bitcoin losses of roughly $475 million, then resurfaced to declare bankruptcy in a Tokyo court.

But in reality, the intrinsic value for these virtual monies was unchanged; they were—and are—worth whatever someone will pay for them or give in return for them at any given moment.

And for as much as supporters suggest that bitcoin and other currencies represent the future of money and a massive change to the global payment and transaction system, people should be looking toward the past as they consider how the story of bitcoin, dogecoin, litecoin, namecoin, mastercoin and any other fabulous new moolah could play out.

Also see: Mt. Gox loses customers’ bitcoins, files for bankruptcy

While traders and true believers say all of this coinage represents a new day, in truth it’s an old story.

For proof, consider that while the largest bitcoin exchange was suffering this week, you could go online and find a “tulip exchange” (read: online retailer) willing to sell tulips for anywhere from 34 cents per bulb to about four dollars per bulb. Tulips are out of season, however, making them hard to get right now; if prices of lilies, now in season, are an indicator, tulips will actually be on sale and available more cheaply at some point in the future.

Also see: Bitcoin Wild West: Gamblers, investors and merchants

The reason that tulip bulb prices are important is that they, too, are worth what someone will pay for them.

And during tulipomania in Holland in the 1630s, the price of a common tulip bulb more than doubled in value to three florins, or about a week’s earnings for a craftsman from that era. More rare bulbs—those priced at 40 florins prior to the run-up—increased nine-fold; one of my college textbooks describing the phenomenon recounted the tale of a single tulip being sold for a dozen sheep and four oxen, two tons of butter, 1,000 pounds of cheese and more.

Mt. Gox files for bankruptcy; what's next for bitcoin?

It got to where single bulbs of mid-range tulips had the value of a small house, and the rarest bulbs grew to be worth thousands of florin, the equivalent of more than $750,000 today for just one flower.

Traders got together in taverns—often in organized discussions—to discuss trading trends, current prices and all the ways they could make a fortune.

Because tulips had potential profit built in—each bulb could be the progenitor for future generations of flowers and additional bulbs—the price obviously got to where it had no basis in reality; when Dutch government officials stepped in to calm the market—believing the wild speculation could hurt the entire economy—tulip merchants decided they needed to protect their profits, starting a selling frenzy.

In a matter of days, the tulip market was pretty much gone.

True believers who simply hoped to get back to break even are still waiting, long after their families and all of their heirs could have consumed two tons of butter.

While bitcoin is a modern-day equivalent—with Internet chats and user groups having replaced taverns—that doesn’t mean the story must end badly.

It just means it could.

From the 1630s to today, there have been plenty of other, similar manias; as a cub reporter, I got to cover just a bit of the wild speculation in jojoba beans in 1985 (no, I’m not kidding).

But the crypto-case bears resemblance to other historical financial events too.

The South Sea bubble of the 1720s occurred when the South Sea Company claimed it could fund the United Kingdom’s war debt of more than 30 million pounds, thanks to improved trade. When British parliament approved the idea, stock in the company went from roughly 100 pounds per share to more than 300 pounds per share. Investors wanted more, so the company kept issuing more stock; at some point directors started dumping shares to protect their profits and the first-known case of insider selling created a panic that killed the company and cratered the market.

While bitcoin and other currencies are supposedly minted in finite supplies—avoiding dilution problems—they can’t avoid combining a hot investment opportunity with human nature. Traders watched as Mt. Gox executives were accused of various double-dealings; true or not—which may be for a court to decide—the chatter made nervousness spread, and once the tide was rolling out it seems to have swept Gox out with it, same as the South Sea Company.

There are much more modern parallels too, like the mania for initial public stock offerings in the mid-1980s, which ended with the Black Monday crash of 1987, or the similar run on Internet IPOs in the 1990s, leading up to the bursting of the Internet bubble.

In both of those situations, people were snapping up new shares based on speculative thinking instead of market fundamentals and intrinsic or fair values.

And because the public loves buying things that are “new,” it wasn’t a hard sell, just as cryptocurrencies are today’s new thing.

Even if we ultimately get to the point where one or two of the 100-plus cryptocurrencies now in existence becomes a worldwide alternative to country-backed monies, it’s impossible to tell now just which one or two will be the winner.

In that regard, the virtual currency craze is a bit like the computer boom of the 1980s, when true believers recognized that computer technologies would change everyday life for everyone, and made bets on the computer stocks that were making headlines and drawing attention.

Most investors were betting on Novell before they ever heard of Microsoft, and were sure that Wang Labs or Prime Computer would be big winners, long before they knew that Michael Dell had started a company, now Dell Computers, out of his University of Texas dorm room.

That doesn’t mean traders in bitcoin have backed the wrong horse here, it just means that the real future of virtual currency may be something that doesn’t exist yet, something that solves the concerns that investors, regulators, bankers and world governments have about a system of money without borders, central banks or anything that makes traditional monies into “legal tender.”

While that story plays out over the next few years or decades, most virtual currencies will be a speculation. Invest in them delicately, if at all; you don’t need a history lesson to know that today’s 1,000 pounds of cheese could be tomorrow’s stinking, awful mess.

More from Chuck Jaffe:

Regulator sounds alarm on bitcoin

Don’t try to time the market

The growing case against ETFs