Bitcoin gained about 2% and broke above $72,000 as crypto futures open interest rose 5% to $107.6 billion, pointing to increased derivatives activity alongside the price rebound. Bitcoin open interest climbed to 687,200 BTC, its highest level since Feb. 25, while Ethereum open interest reached 13.72 million ETH. At the same time, Bitcoin’s 30-day implied volatility fell to 55%, a two-week low, indicating calmer options-market expectations even as market participation increased. This follows earlier signs that funding rates across major crypto exchanges had returned to neutral.