I dont think so bitcoin is just in the internet,, internet money like.. dollar is hard money that can use every time,,, it is a cash you know not like bitcoin that need a transaction to send some money. and also dollar is more popular than bitcoin many people doesn't know about bitcoin so that it can't replace the dollar.
Yes bitcoin for internet but you have to know that in any place where international business exist internet also exist and like dollar we can also use bitcoin at any place and the transactions of bitcoin is also very convenient like dollar or we will say that bitcoin transactions are more convenient than dollar.