There are a lot of risky things in cryptocurrency, but if it actually works well for someone, it's going to be good money. For example, check airdrop tokens; some people buy at the pre-market price before it's listed or launched on any CEXs. Sometimes it goes their way when they list at a higher price than the price they bought it, while sometimes they regret taking that decision.
The second one is pre-deposit, which most exchanges like Bitget, Binance, MEXC, and more do in collaboration with project listings, allowing people who participate to have a chance to get a good reward, like sharing $10k worth of Nero tokens as a reward just for depositing it.
I think the third one is public sales, too. Pump.fun did its own, which I participated in, and we almost cried because the coin seemed to be going down and losing money until some tier exchanges announced it and started going up before it was later listed. In all of these, which one would you advise someone to go for without any panic?
All I do with the two is participate in potential airdrops and the second one you mention is because on bitget there are instances where as long as you have a BGB balance that meets their criteria, you can be showered with other airdrops that they have.
Through this, even if you are not trading, you can really earn rewards and I hope this system that they have lasts, but I haven't tried it on others because their criteria are too high, like in mexc, the requirements are too high.