sometimes I think if you look at the amount of token supply in such a large amount that trillions and trillions after the project runs several months or years, the token will be burned, what for if you make tokens with a large supply, but will be burned, ...?
Well, supply is nominal. It's not a "real" factor that underpins what is the coin's fundamentals.
For example, XRP obviously has a lot more adoption and use, as well as market cap, compared to something like Byteball. But XRP's supply is in the billions while Byteball, IIRC, isn't even in the millions. Does that make one coin/token inferior/superior to the other necessarily? I don't think so, at least.
In regards to burning, it depends on whether or not it is followed through with. If you buy into a token with the hope that some supply will be burned in the future, then it's extremely high risk.