For such a long time, it is advisable to keep coins that have already been tested by time (BTC, ETH). And if we consider altcoins, then in my opinion they are better suited for a short distance, although it is quite possible that in the course of years they will shoot up. In addition, some altcoins offer passive income. I don't want to advertise, but for example XXP offers something like a dividend. That is, from the number of purchased coins, you can get a percentage of their storage. It is also advisable to keep such coins for a long time, although 10 years is really a very long period and it is not a fact that the percentage will pay off during this time.