The Consumer Financial Protection Bureau (CFPB) has issued a new warning to the general public, alerting everyone to the potential dangers of Bitcoin, Litecoin, Dogecoin, and other cryptocurrencies.

In the Monday document, the CFPB warns that such currencies have four notable risks:

Hackers. Virtual currencies are targets for highly sophisticated hackers, who have been able to breach advanced security systems. Fewer protections. If you trust someone else to hold your virtual currencies and something goes wrong, that company may not offer you the kind of help you expect from a bank or debit or credit card provider. Cost. Virtual currencies can cost consumers much more to use than credit cards or even regular cash. Scams. Fraudsters are taking advantage of the hype surrounding virtual currencies to cheat people with fake opportunities.

The warning comes just two days after Dell CEO Michael Dell announced that his firm recently accepted a large order (around $50,000 worth) paid for in bitcoins. Dell became one of the largest corporations ever to begin accepting the virtual currency.

In February and March 2014, two financial regulatory bodies issued new Bitcoin-related warnings and sanctions. The first came from Texas Securities Commissioner John Morgan, who cautioned investors away from Bitcoin.

“Although digital currencies such as Bitcoin are often touted as a sophisticated, online alternative to traditional currencies, investors should realize these currencies are not tangible, they are not issued by a government, and are not currently subject to traditional regulation or monetary policy,” Morgan said in a statement on February 25.

The second came from FINRA, the financial industry’s self-regulatory organization. It published an investor’s note stating that “selling and using bitcoins carry numerous risks.”

The CFPB encourages Americans to submit virtual currency-related complaints via its website. Ars has filed a public records request to see how many people have actually done so.