But it seems a long way to go before we could do that and also I think we could never get paper money out of this generation.
On point, crypto currencies won't be able to fully recognize if we can't get out paper money.
For example paper money that came from central banks is what makes the government functioning and powerful people are behind them. That alone is an obstacle for Bitcoin to be a world currency. Like what you said it has a long way to go, maybe on 30,50,100 more years where technology is at the hands of everyone maybe Bitcoin is the currency that day. Gold, silver, bronze, goods have been the value of exchange ages ago. In the meantime paper money is our value of exchange and maybe in the future cryptocurrencies are the world's money. Who knows the future is still a mystery. And I hope that Us the new generation will make Bitcoin the world currency.