I guess the FBI is already after bitcoin for many years now. Since the beginning of the Silk road crimes related to bitcoin were taking place over all and I guess FBI would have been after bitcoin since then. Though the crimes related to bitcoin might have reduced now, it surely would be in the blacklist of FBI.
I don't think crypto investors should have to worry about their investments if they are showing their earnings to the government.
So as long as you are not doing anything illegal then you are good to go.