It's official now; let's see if any other crypto companies will also fall. Looking at BlockFi and Nexo specifically.
https://finance.yahoo.com/news/blockfi-halts-withdrawals-cit...
Regulation also doesn't fully solve this, we still have fully regulated bank failures today: https://en.wikipedia.org/wiki/List_of_bank_failures_in_the_U...
What solves it is the Fed stepping in and agreeing to print money no matter what to cover customer deposits if need be (FDIC insurance). That's hard to replicate in the crypto world but likely possible.
The FDIC is not related to the Fed, and certainly does not entail a commitment of mobetary policy (it involves a fiscal commitment by the USG, but the whole point of the Fed is to separate monetary policy from fiscal actions.)
https://blockworks.co/news/blockfi-stops-withdrawals-hinting...