My most recommend way is bot trading i've never tried it but also going to try and make it. I've seen some videos of it that really quite catch my interest especially when i am lawsy trader and it doesn't just trade for you and provide automation it also gives you profit by trading without any emotions attach.
I think it is the topmost way of getting profit while sleeping since it automatically trades with the trader's setting set on it, so basically you set it before sleeping and monitor it the next morning. But trading bot does not guarantee a 100% profit, since it just follows what the command has set on it by its trader unless the trader is capable of great instinct and market prediction bots could perfectly work on that.
As long as the bot is properly coded and properly tested, i think there should be no problems with this.
Yeah, don't just download bots on any website. Try to join telegram group first or any community that has to do with trading bots so you'll know what to expect.