#交易类型入门 Good, this is a concise introduction to types of cryptocurrency trading (approximately 120 words):

**Main Types of Cryptocurrency Trading:**

1. **Spot Trading:** The most basic form, directly buying digital currencies (such as BTC, ETH) with money and holding, buying low and selling high to earn the price difference. The risk is relatively low (the price fluctuation itself is large).

2. **Contract Trading:**

* **Perpetual Contracts:** The most popular, with no expiration date, can go long (bet on price increase) or short (bet on price drop), usually using leverage (borrowing money to amplify profits/losses), the risk is extremely high.

* **Futures Contracts:** Have a fixed expiration date, must settle upon expiration.

3. **Leverage Trading:** Usually refers to borrowing money to amplify the principal for trading in spot or contracts, exponentially increasing profit potential, but also exponentially increasing loss risk, making it very easy to get liquidated (losing all capital).

4. **Quantitative Trading:** Utilizes algorithms and programs to automatically execute strategies (such as arbitrage, high-frequency trading), with a high barrier to entry.

**Summary:** Spot trading is fundamental, with relatively controllable risk; contracts and leverage offer more strategies (short selling, amplification) but the risk increases dramatically, especially dangerous for beginners, non-professionals should be cautious. **Understanding risk is the first lesson.**