Bitcoin hit $61,000 on Tuesday, leading crypto gains ahead of expected Fed meeting.

- BTC hit a three-week high at $61,330, then eased slightly.

- The CoinDesk 20 Index rose 3%, with ETH, SOL, XRP, ADA, and AVAX all up 2%-4%.

- Significant sell orders between $61,000 and $62,500 could limit further gains.

- The Fed is expected to cut rates, which could impact the crypto market.