…ear references to blockchain as well. The chain is a huge network; how can you possibly trust them? If you were sending someone 4 Bitcoin from your wallet, how would you know for sure that someone in the network isn’t going to tamper with it and change 4 to 40 Bitcoins?
Before Bitcoin, there were loads of iterations of peer-to-peer decentralized currency systems which failed because they were unable to answer the biggest problem when it came to reaching a consensus. This problem is called “Byzantine Generals Problem(BGP)”.