

You are supposed to, but it is only insured to 250k. That might seem like a decent amount but if you suffer inflation and a government that is inclined to decrease FDIC rather than increase, you might end up not really getting much value out of that cash.
250k is not a very big nest egg for retirement.
There is also the legality of it and if it is treasonous. The one person at least the senators have some saftey nets from the Supreme Court but they still are at risk here.