An early Ethereum ICO participant who initially purchased 100,000 ETH for $31,000 has recently sold 4,283 ETH for $18.97 million. Since 2021, the investor has sold a total of 44,284 ETH at an average price of $2,378, amounting to $105 million in sales. The participant still holds 55,716 ETH, valued at approximately $261.6 million. The total profit from these transactions is estimated at $366.8 million, representing an impressive 11,835x return on the initial investment.