Blockchain

Imagine living in a society where you can send money to someone without the use of a bank in seconds as opposed to days and without having to pay exorbitant bank fees.
Or one where you control your money completely and store your money in an online wallet that is not connected to a bank, making you your bank. You can access it or move it without a bank's permission, and you never have to worry about a third party taking it or a government's economic policy influencing it.