Arthur Hayes, co-founder of BitMEX, has an estimated net worth ranging from $200 million to $350 million, according to a report by Arkham. During the 2021 bull market, Hayes' wealth surpassed $1 billion, marking him as one of the youngest billionaires in the crypto sector. However, his net worth has significantly decreased following market corrections. Hayes' on-chain holdings are currently valued at $42 million, with the largest portion in USDC stablecoin, amounting to nearly $27 million. He also holds $8.6 million in Ether.Fi's EETH and WEETH products, and $8.5 million in investments across Ethena (ENA), Lido (LDO), and Pendle (PENDLE). A significant part of his wealth is tied to his stake in BitMEX, which Arkham estimates to have a 2026 valuation of $500 million, down from its 2019 peak valuation of $3.6 billion.