Banks will. WalletOfSatoshi is already showing us how corrupt banking will exist on the bitcoin standard just as corrupt banking exists on the fiat standard.
Discussion
If they play rehypothecation games, they will eventually be blown away.
On sovereign use case of #bitcoin people will automatically gravitate towards more easy to use services.
How so? Fractional reserve banking is already rampant, and there's nothing I can see about Bitcoin that will make that stop.