1. Investing in crude oil in futures trading: Investors can invest in futures exchanges by purchasing crude oil futures contracts and need to open futures accounts.

2. crude oil ETF invests in crude oil: buying crude oil ETF can indirectly invest in crude oil, and ETF tracks the price of crude oil.

Investing in crude oil requires understanding the basic situation of the crude oil market, which is influenced by global supply and demand, political and economic factors and other factors. Investors need to have market analysis ability, financial strength and risk tolerance, because the crude oil market fluctuates greatly.

Futures trading requires investors to have the knowledge and experience of futures trading, and be familiar with futures market rules and trading processes. Pay attention to market trends, master stop-loss and profit-taking skills, and avoid excessive trading and emotional trading.

ETF investment in crude oil is relatively simple, but we need to know the cost structure and investment strategy of ETF funds and make wise investment decisions.

In short, investing in crude oil requires market analysis ability, financial strength and risk tolerance. Choosing the right investment method should be based on personal situation and investment objectives.