If you just want to make an investment to earn the difference, then futures steel is a good investment method. Futures and spot are very different. Futures prices are predicted by speculators according to different contracts, and then profits are earned according to the quotations of buyers and sellers. Therefore, there is a two-way trading system in the futures market. Buying and selling can make money, and shorting can make more money. Prices can only float, but not cheat.
Spot price is often the embodiment of the demand of both supply and demand sides in the market, and it is the real price of steel prices. The spot market is the current price and the future is unpredictable. At this time, the futures market is needed to avoid the risks in the spot market.
You can make use of the different characteristics of the two markets to make hedging transactions, which is more scientific.