The great thing about bitcoin is we don't need a bank. We are our own with btc.
Damnit that sucks if that happens. Thats why BTC is better (no one can freeze your account)
Only who have the private keys can "freeze" it, how? By forgot the private key itself

. If we are thinking that bitcoin can replace (kill) the actual economic system based with intermediary (banks) we should also think how to teach who don't have any knowledge on how to use a PC/device and related wallet/client.
PS: remember who owns the private key owns the bitcoin!
Thats why if you have your coins in an exchange, you don't own the bitcoin, they do... something that a lot of people seem to forget.
Unfortuantely tho, leaving your BTC in an exchange is the only way to benefit from quick pumps, otherwise you miss the opportunity since it takes too long to deposit BTC.
Decentralized exchanges will probably get around this so you can keep your coins yourself right up until the actual trade. No more relying on third parties.