Basically just use 2% of your entire portfolio for trading and you're safe, on top of that you don't use all of that 2% but just few percent of it if you future trades.
It's simple and basic money management that people often overlook but can save them from losing in the long run.
Too bad though most of people will ignore such advice and just going into trading thinking they're the chosen one and gonna become the best trader in the entire world.
The fact is, they still use all their money for futures trading, hoping to multiply their profits if they have a large capital... on the other hand, they must be prepared for all the big risks that can occur when the market moves in the opposite direction.
How many traders have much larger positions? Recently, influencer X lost hundreds of millions of dollars due to futures trading. Even if it were your position, you might consider suicide because of the massive losses.
So I'm not particularly enthusiastic about futures trading.