I don't even trust my bank to hold my FRN's securely.  I rarely keep more than 200 in my account.  It is there for direct deposit payments, which get withdrawn as rapidly as possible.  Cash in safe is as secure as FRN's can be...I'm just now looking at Bitcoin as an alternative, and will be dabbling with "losable" quantities at first, once I understand the technology sufficiently to delve into it.  I wasn't even aware of Bitcoin until two days ago...