This is not only the basis, you should consider a lot of things not only how their token economics works.
This token economics is just a part of identifying how good altcoin but this is still important though, you should identify it first.
There are some projects that their supply is quite low or decreasing or limited, but on some part of their project is not good like no use cases or product, it's still useless.
Sure, but that wouldn't happen because of inflation so it's not related to this. It would happen because it token itself doesn't have good fundamentals. With high enough inflation on the other had (which i was talking about) the token price is guaranteed to drop.