Having a real digital currency means you can do a lot of things that the dollar can not do easily. For example, you can have a family wallet with pre-set spending limits. Your teenage daughter's family can buy certain goods shops at certain times with Bitcoin Wallet, your daughter in college can only buy books at the school store, do not have beers for Saturday's frat party. Digital currency can be easily programmable by many owners for many different parameters. The range is not a bitcoin, but it will give you these options.