Tom Hougaard has an excellent argument on this topic which is contrary to the established and mainstream advice of using only 2-5% per trade. He basically says what is then the purpose of your deposited funds in your trading account if not using it for trading? You can easily find some of his videos online and one of those truly changed the way I trade. You will never build a solid account or huge profits if you only use 2% of your account size. But it?s not like you need to put everything in one trade, he explains this very nicely with the example of how many traders add to a winning position (it was very low).
And one more thing i remembered which left an impression and still remember it because it’s very true:
If your trading feels boring, just increase the lot size