Today at Disrupt SF 2017 Vitalik Buterin sat down with AngelList founder Naval Ravikant to talk Ethereum. Because, well, Vitalik created Ethereum. Up front, Ravikant asked him to explain Ethereum and this is what he said.
“You basically need to have some system that keeps track of how much money you have at any given time, how much money you have the right to spend," Buterin said. "You can very easily do it with centralized servers, but if you want to do it in a decentralized manner, it’s actually a very hard problem.”
— TechCrunch (@TechCrunch) September 18, 2017