I don't think fiat will ever die entirely in as much as there is Government, what we want is a free monetary system where the manipulations of banks can be reasonably reduced; even with your digital currency, everything will still go back to fiat because you must make some local transactions.  But in all Bitcoin have come to rule. Besides, I have PayPal and need bitcoins anyone  interested should pm so that we can work it out. No scam, please!