I suggest you not hold altcoins for too long because in my opinion not all altcoins can provide a lot of profit, altcoins have a very high risk if they are durable, only altcoins that have the potential to make a profit even though there is no guarantee because no one knows when the price will be rose, as did the price of Dogecoin.
That is right, it doesn't always mean that you will make a profit from HODL. It depends on what coins are in your wallet, and the question is which one, or which coins, will be profitable over a period of years, it is hard to say due to no noe knows the future. The most secure way is nothing more than long term holding BTC.