I was just looking at the coinmarketcap table since 2013, I was surprised in what I saw, many coins topping the charts then are now almost non-existent, we need to be careful of the kind of coins we hodl especially for long term. Most of these projects just die after the initial hype.
Of course, you should always be careful, especially when it comes to investments. And investments in cryptocurrencies are even more risky, so soberly weigh all the risks. You need to hold only promising coins of projects that have already established themselves in the market. Unfortunately, many altcoins are weak projects with a weak idea, so their life cycle will be short.