Michael Saylor, a crypto investor and chief executive officer of MicroStrategy Inc., asked rhetorically in an interview with a precious metals website, “Do you go to your great-grandfather for investment advice on new technologies?”

Munger’s warning is looking pretty good about now. Days ago, a criminal gang hacked Colonial Pipeline Co., in effect shutting down the conduit for 45% of the East Coast’s fuel supply. Details of the hack haven’t been revealed, but the group’s modus operandi is to encrypt its victims’ data and threaten to release it publicly unless paid a ransom in Bitcoin or another cryptocurrency.

How’s that for “contrary to the interests of civilization”?

The overwhelming majority of Bitcoin users have nothing to do with the criminal underworld, and plenty a heist is funded by plain old U.S. dollars. Blaming Bitcoin for the activities of its holders is a bit like getting mad at a $100 bill for being used in a drug deal.

But after letting Bitcoin spend most of its 12-year rise outside the watchful eye of government, regulators from the U.S. to Europe are cracking down. Their ambition is to take away the treasured anonymity that makes Bitcoin and other cryptocurrencies a haven for hackers and other criminals. “We don’t really have an adequate framework to deal with the different issues that they pose from a regulatory perspective,” said U.S. Treasury Secretary Janet Yellen at the Wall Street Journal CEO Council Summit on May 4, calling crypto’s use in illicit activities a topic “well worth addressing.”

Cryptocurrencies can be a pretty poor currency for criminals. Bitcoin is built on a digital ledger that publicly records every transaction, with users identified by a string of characters called a “wallet address.” If a law enforcement agency can figure out a wallet’s owner, it essentially has access to that person’s entire transaction history, no subpoena required. Compare that with the relative untraceability of paper money, and the good old greenback starts to look pretty good for your average criminal enterprise. But for online crimes, Bitcoin remains the default payment. Since the FBI shut down the Silk Road marketplace in 2013, other digital currencies that aren’t as easily traceable have emerged. Yet Bitcoin is still the most prevalent, in part because it’s so easy to get and because it’s held its value better than others.

As the Colonial hack shows, ransomware is by far the fastest-growing problem. In 2020 almost $350 million worth of cryptocurrency went to wallets associated with those attacks, quadruple the level of 2019, according to Chainalysis Inc., a Bitcoin forensics firm.

Regulators have taken notice. Toward the end of 2020, the U.S. Treasury Department proposed rules that would require banks, exchanges, and anyone else dealing in Bitcoin to make a greater effort to discover the true identities of people trying to withdraw the currency—and, in some cases, to figure out to whom they’re sending the currency.

The Treasury drew more than 7,000 letters during its official comment period. Negative comments came not just from crypto-focused companies such as cryptocurrency exchange Coinbase Global Inc. but also from Wall Street heavyweights like Fidelity Investments, which has recently tried to build a presence in the cryptosphere. Some analysts said the proposal could even cause the price of Bitcoin to crash. Former Treasury Secretary Steven Mnuchin pushed to finalize the rules before President Donald Trump left office, but his department ultimately punted the final decision to the Biden administration.