$BTC 制**

#(1) Contract Type**

- **Perpetual Contract** has no expiration date and anchors the spot price through the Funding Rate mechanism, suitable for long-term holdings.

- **Delivery Contract** has a fixed settlement date, suitable for short-term arbitrage or hedging.

- **Forward Contract (USDT-based)** is priced in USDT, suitable for multi-currency trading.

- **Inverse Contract (Coin-based)** is priced in BTC/ETH, suitable for investors holding specific cryptocurrencies long-term.