When you always keep the mined altcoins, you will die one day as the guy with the most altcoins in his wallet.
It's definitely okay if you did leave a note to you children or grandchildren about how to continue your journey. It will be considered as their heritage and the note would be like your last will.
Actually nobody will know that you keep the most altcoins and then died. You're 100% anonymous unless you reveal yourself.
That is what I observe too, altcoins is very far from the value of bitcoin right now. No one knows which of them will survive in the long term. If you know you can make a profit now either bitcoin or in other coins then go, if you don't, you will missed the opportunity that may not come back anymore.
Most of the altcoins will die just a few days after they were launched. There are some that stays alive for a month. You're lucky if the altcoin is still alive after a couple of months. All of these are true and it's inevitable. There is a limited number of altcoins that you should hold for a long time. That's why you should always keep an eye on the news about the altcoins you've invested, sell the majority of your coins at the best time possible, and then invest in a new altcoin. That's how the game of altcoins is played.