Which Bitcoin ETFs are currently available and how do they differ?

Bitcoin ETFs allow investors to gain Bitcoin exposure through traditional brokerage accounts without owning actual Bitcoin. Spot Bitcoin ETFs hold real Bitcoin and track its price directly. Futures-based ETFs use Bitcoin futures contracts instead. Key differences include: expense ratios (typically 0.2-0.95% annually), custody methods, and tax treatment. Major spot Bitcoin ETFs launched in 2024 with lower fees than earlier options. Spot ETFs are generally preferred for long-term holding due to simplicity and lower costs, while futures-based ETFs may suit traders seeking specific strategies. Always compare fees, tracking accuracy, and your investment goals before choosing.