Very True, people who participate in this Play-to-earn things should never consider this as an Investment, or think that they actual can earn good amount of money from this game. This is more of an entertainment, like how all conventional (non-blockchain game) has ever been, earning some buck is a bonus. If people think this kind of thing is investment, they will end-up doing the greater-fool investment.
Play-to-earn should not be included in the investment category, so we must wisely determine the top potential coins for long-term or short-term gains. I think the concept of play-to-earn projects is no longer in demand by the public, so without hype the project will not increase, so avoid investing from hype coins because if a new coin crashes, there is no guarantee that your investment will return.