i dont see it as a replacement for other currencies. bitcoin will exist along side other forms of money including fiat currencies and people will choose which they want to use based on what value those forms of money offer.
So ^this is often the response. "Bitcoin wasn't particularly meant to be revolutionary, just a cheap way to send money."
See my signature for a palatable solution to having an unbounded supply that has significant protection against inflation and could actually replace fiat currency.
thats not really what i meant. i think of bitcoin as a form of money not just a way to send money.