Op, it would have been nice if you tell us whether you are experience trader or beginner with trading, but from your question, one would conclude that you are a beginner trader. Therefore, I suggest you stay away from trading futures right now because it doesn't matter how much you are using to trade, so far you have little or no experience there is a higher chance that you're gonna lose that money, so save your money, time, stress and pain it will cost you when you might have blown the funds and invest it into learning, then when you must have gotten the knowledge and experience required to trade futures then you can start your futures trading journey.
yes, he should have some experience in trading. At least you have enough experience in spot trading. it can give him a good picture for market analysis in futures trading.
and also he has to start with a small value first, don't play too much with large leverage. After really mastering futures trading, if you want to add more capital, that's not a problem. The most important thing is that he understands the risks.
Spot trading is nothing compared to futures trading, so we should not advise anyone to use them for comparison, or else, the person might regret it. Spot trading is not a leveraged product, at least when you are trading a particular asset without using tokens to multiply the risk, but for futures trading, one should note that the risk is high and the best to deal with it is when they are so sure of your trading expertise, it's never a child's play.
Regardless, one thing I love in the world of leverage is that no one is forcing you to use all the risk permissible by your leverage. Personally, I like to select the highest leverage permitted by the broker or the trading platform I use, yet, I ensure that I trade based on my plan only, I don't allow the leverage to control me. Risk control in my trading has never been an issue for me, and once a trader can work on their trading emotions, the issues of trading with high leverage will be out of it all.
The remaining criteria for success that matter is for the trader to have a good trading system and plans regarding it and be such that will stick to the plans with the right psychology of trading.