There are almost 200 currencies of the world, but there’s only one international currency. There are almost 200 currencies controlled by central banks and governments, but there is only one mathematical currency today, and that is bitcoin. We are going to build more of them. Cryptographic currencies are going to be a mainstay of our financial future. They are going to be a part of the future of this planet because they have been invented. It’s as simple as that. You cannot un-invent this technology. You cannot turn this omelette back into eggs. ― Andreas M. Antonopoulos, The Internet of Money