Just by using your phone, you could purchase almost anything. No need to withdraw on an atm. No more heavy coins on your pocket. Paying bills, and purchasing tickets without standing on a line. Very convenient and less time consuming. I know we're already using credit cards right now, but using a single currency like bitcoin world wide could really help on transaction, having less error than the normal and faster transfer and of course the security. Do you guys think this could happen in the future of bitcoin?