You also risk that something will happen to your coins at the exchange, you lose control just to do what? Turn it to fiat money and back to bitcoin while creating a taxable event and paying exchange fees?
It is even sillier. OP can sell 1 Bitcoin for 90 thousand and within one hour they may only get a portion of that if the market moves significantly. Bitcoin to Fiat to Bitcoin is simply a waste of time and possibly of money too.