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Ethereum Co-Founder Vitalik Buterin Discusses Bitcoin’s Long-Term Security https://news.bitcoin.com/ethereum-co-founder-vitalik-buterin-discusses-bitcoins-long

• WheelsAtLarge 4y ago
  Buterin, is right, the security will come down to fees when all the coins are mined. If the fees aren't high enough to keep the miners interested then the network will start to fail as the miners stop mining. But that's not expected to happen until 2140. A lot will happen between now and then. At some point the miners will have to deal with that but that's a long time from now. My guess is that in 100+ years there will be many innovations to the Bitcoin protocol. All of them will make sure no one loses their coins. Self interest is the motivator for that. The bigger danger is being regulated out of existence but that's not happening anytime soon.