Well, I am glad for all of them who made a lot of money with meme coins, the fact is that many people made a lot of profit if they sold some meme coins when was their top! I don't think it's pure luck, it's just a situation on the market, the hype started by some very rich people created a wave that affected the price to rise, all holders and supporters benefited a lot from that! I also choose more proven assets but looks like these meme coins can do more on the market and I think for some of them there's a future!
You can indeed make a lot of money with these meme coins but I doubt that any of them will have a really long term future. Maybe the most popular one (as Doge and SHIBA) will continue to exist, but I think 98% of all others will cease to exist. If you can get in on a new memecoin from the very beginning (i.e. the moment they are listed on some obscure small exchange) than you can really make money. When they get listed on the top exchanges, in most of the times, you are already too late to make a big profit.