An Ethereum ICO participant, dormant for eight years, has reactivated by moving 150,000 ETH, valued at $645 million, to a new wallet for staking. Originally investing $310,000 in the ICO through three wallets, the participant received 1,000,000 ETH, now worth approximately $4.3 billion. After the recent staking transaction, the participant retains 105,000 ETH, valued at $451.5 million, across two wallets.