banks are not secure at all... they just backed by government agencies and the government itself... however if the big bank collapses it will destroy the whole economy and bring the country once more into a crisis.... a bank like chase manages more than a trillion dollars in assets imagine all that being lost... heck we had the crisis in 2007-2008 for a 750 billion and a housing bubble.... also owner of the banks have purchased massive power in government that do shady works... at least btc is not controlled by anyone... and they cant hack you unless they hack an exchange site.. like they did with bitfinex which i think it was an insider job...