There's no way for that. Maybe if you mentioned other small world currencies I'd say that's possible for Bitcoin, but for altcoins, it's impossible. Only if they produce their own centralized coins and burn paper money that could happen.
Why ask if altcoin will replace the dollar? I think Bitcoin is closer, but as a national currency its important for gov to gain controll of transactions. Bank of russia are workink to develop crypto rubel
Do you believe all Muslims are bad? How do they differ from the terrorists?
Why do this debate in a bitcoin forum? In a sick world who make it all into politics and identity I know someone who DONT CARE. Mr. Bitcoin. Just a number, no muslim or christian name, no male or female, no sucidebomber or anything. Just boring numbers