Investing in memecoin is like gambling, playing slot games, completely a game of luck, because we can assume that this dudes did a good research before investing in this aforementioned meme coins, but at such an early stage, what is there to really search about? So it's a big risk they took (possibly with an amount of money they can comfortably afford to loose anyway) and luckily, it paid off for them.
Like I did have said above, memecoins are like playing Slot games in gambling, they are the easiest way to make a huge life changing money in crypto, but also on the other hand, one of the easiest ways to lose money as well.
But one thing and way to really win in meme coin is to find them really early, finding and investing in memecoin really early is the secret key to a life of financial freedom, but also very risky, I guess it's all about the higher the risk, the higher the reward.