Others that diversify their investments into some possible investments like real estate or probably shitcoins and altcoins also loose most of their assets at the event of their death or loss of account vital information. I would say that since no one could possibly predict his fate, then it's with you allow your investments until retirement or you accommodate a next of kin that would possibly have access to your wallet in such case.
Diversifying your bitcoin portfolio into shitcoin is gambling because bitcoin is king of all cryptocurrency and bitcoin price movement controls shitcoin. Only bitcoin is the unique coin worth investing into because the price increases overtime and bitcoin is a store of value. Shitcoins are useless and depreciates in value overtime.
If you want to diversify, you don't diversify into investment of the same line because the reason of diversifying is to secure your wealth in various assets so that if one is not doing well, the other can balance up.
A bitcoin investor that feels he has gotten a good amount of bitcoin and wants to diversify into other asset should diversify into bond, stock, equity and cash equavilents. It's good that you also have knowledge on the asset that you want to diversify into in order to avoid regrets in future.