In future everything will Bitcoins. mean every transactions like purchasing or selling . Online shopping and doing transactions. its not a paper currency in future atm mechines/ credit card payments/ net banking everything disappear with bitcoins.
Yes in future digital currency will be more popular and have a high demand in the market that time, and the most popular among all coins will be a the bitcoins, many bussinessman will get interested on it and see potential on it, they will start their bussiness with bitcoin accepts as a payment in their products. bitcoin will be more huge someday.