In the US, depositor`s accounts are insured up to $250,000.
On the BTC exchanges, your accounts are not insured at all, and you actually run the legitimate risk of having your funds mishandled or downright stolen. So OP has a point.
Not really.
FDIC insures ten trillion in deposits.
FDIC has 30 billion dollars, plus 100 billion dollars line of credit.
Not exactly very solvent.