Check this board out. Many guys lost their btcs on mybitcoin.
in before: Sending an anonymous currency anonymously to a unknown website in hope they will keep it.
Never ever store your private data online. Neither on dropbox nor elsewhere. AND ESPECIALLY NOT YOUR MONEY.
I store money on PayPal and my online bank. I have full control of where it goes. So does anyone who logs into my account.
Noob
and with those accounts you have recourse if someone gets unathorized access and does that. with bitcoin - you don't. so stop making all these asshole comparisons of bitcoin to all other established and secure means of financial security.