It's not a news that altcoin will go to zero for 98% of them. Majority of altcoins don't even need to exist but the developers want to extract money so you got some shitty no utilities altcoin.
If that chart includes the meme coin being deployed everyday, I bet the number would be 99.9% of altcoin are going to zero.
Never hold your altcoin, never marry your bag, marry your bitcoin instead because it's where you gonna get your money safe and growing.
Those memecoins don't need to exist honestly their have done a lot bad than good for the entire cryptocurrency market, majority of them have been Chanels for scammers to get away with investors Money with zero interest in building a project as claimed initially when the hype is still very on.
Memecoins continue being a thing only due to greedy investors who think to be too late to invest in Bitcoin. They aren't satisfied with a potential profit of 10% to 100%. They want more. They want their few dollars to turn into something like thousands of dollars overnight. And that is where memecoins come into the scene with such promises of quick wealth without any effort.
Charts like the one OP shared are important to show how dangerous such offers are, as they can melt your funds instantly, without any recovery chance.