used Bitcointalk to promote his own premined shitcoin, and left right after. He started strong with "code is law", and abandoned that too when he and his friends lost their coins in a smart contract they didn't understand. They even called the only person who understood the contract "the attacker" and hardforked their centralized coin, thereby abandoning the one USP they had.
Ethereum got big selling tokens for ICO-scams that spammed all over the internet.
Decentralized contracts were (still are) of interest but the hard-fork reminded me that I didn't know enough to be comfortable putting something like a trust or other valuable contract on an ETH token.
I've spent bitcoin so in reality it has already worked as a peer to peer payment system.