Investing in memecoins profitability is viable only if you can buy it on pre sale price. Before exchanges get their hands on them.
No profits would worth the risk people are taking, I personally think that it would be smarter to avoid it as much as possible so that people would be making a lot more money with things that would make a lot more sense. I understand that it wouldn't be that easy to handle, after all why would we want to see something that would make no sense at all in any other investment type, memes are not stuff you would want to put your money into.
Doge was a known one and it got up, then people started to do other stuff, nowadays Pepe is getting more famous, and I agree that's a famous meme without a doubt, but that doesn't mean that it would be smarter to just go with that, I would rather have something more legit, like btc or eth instead of any of these meme projects.