You can't make constant profits from meme coins, not only in meme coins, you can't make constant profits with anything in a market that is extremely volatile and unpredictable like the cryptocurrency market. Bitcoin is the most trusted and reputable cryptocurrency in the market, but even if you invest money in Bitcoin, you can't expect to earn constant profits because there will always be ups and downs in the market.
Cryptocurrency market is regards as the most volatile market as no tokens can give you profits always, it could also be why many individual consider cryptocurrency to be gambling as in gambling too you can't be sure that you'll make profits every time that you're playing but there are some tokens that you'll have a higher chance of getting profits and that's Bitcoin. Memecoin can't not give you constant profits regardless of how you're trading.
If you're lucky and you buy the perfect memecoins that is going to be love by others and they buy too then you can make profits as you invested first and others buying will make the price to increase. Memecoin are too many to know the one that is going to do well and this just makes it difficult to make gains but some individual are lucky to invest in the right ones.