Ethereum founder Vitalik Buterin sold two of his altcoins, according to onchain data. According to Onchain data, Ethereum founder Vitalik Buterin sold memecoins that were previously given away for free by cryptocurrency developers. According to the data, Buterin sold ERC20 and PUPPIES memecoins, earning $13,889 and $114,700, respectively. He converted the proceeds from the ERC20 sale into USDC and received the proceeds from the PUPPIES sale in Ethereum.