Bitcoin is a good store of currency but we're told not to hoard money. There's like, one gold backed bank that I know about. Other than that, it's probably best just to not hoard money and spend it for the sake of God. Plan wisely.
you can open a non-interest bearing checking account with a bank, if that is your concern. You do not have to provide the bank with your tax ID as there is no interest income to report.