Honestly it's almost impossible to guess the up[side potential of a promising project let alone some worthless meme coins. The best scope of action would be to sell some take out your investment and sell them later at periodic intervals.
I would sat that there are some few methods of doing TA to see if the price should be higher or lower, that's what people use to decide what the price of something should be worth, but we all know that most of the time that is wrong and many people end up losing money because of it. However I do think that if you believe in the coin you are holding, you are going to make a good amount of return from it for sure, it may not be huge right away, but it could be very decent at the end of the day, and I believe as long as you can wait long long long time for something, eventually it will become a good coin as long as it is actually a decent project.
I am not talking about shady or scammy coins, there are tons of them as well, I am talking about projects that promises a good future, if you find one and think that it will not be zero, that will probably go up decently in the long term.