The CFPB names more specific risks that consumers should be prepared for, including volatile exchange rates, potential high fees on exchange platforms, and fraud risk. If your funds are lost or stolen, they can be especially difficult to recover, thanks to the decentralized nature of blockchain and lack of any governmental oversight.
GURA: Their market cap worldwide is now close to $2.5 trillion, which is almost as large as the GDP of France. Even the big Wall Street banks now trade bitcoin. And Gary Gensler, the head of the Securities and Exchange Commission, shares Warren's concerns. Here's what he said in a recent speech.

All the signs, however, were there. Like previous bubbles, people were basing their belief in the cryptocurrency on their emotions, not any intrinsic value. Then there was the FOMO element, which only compounded things. Essentially, bitcoin became an international fever. Random companies were “pivoting to blockchain” for no apparent reason other than that it seemed like a way to create buzz. But when the bubble bursts, FOMO turns into fear of losing, which makes for an especially rapid plunge.
Pa´stor, L. and P. Veronesi (2003), “Stock valuation and learning about profitability”, The Journal of Finance 58 (5), 1749–1789.