Holding is the only way for altcoin investors now unless you want to accept your losses and exit but its better to have patience, i have seen coins that worth 1,500$ a year ago and they are now 200$ , i have sold airdrop tokens that should worth 150$ for 10$ to sustain but i am not stupid enough to get rid of all my tokens and coins because market is not in my favour, be wise and remember that those tokens you are getting dispose off can turn something when market start turning for the better, be determined to win,when thinking forward always think backward as well.
Seems your don't get it, each altcoins has it's season. Bitcoin currently is the only coins that can't be replaced by another coins but each Altcoin can always be replaced by another's superior coin (based on rge same idea and technology) which will be developed in the future. The altcoin that were present 3-5 years ago, most of then are no longer relevant thats the fate of most Altcoins currently in the market.
Altcoins especially tokens should be traded and not consider investing vehicle like how bitcoin and most coins with their own blockchain are been considered as investment vehicle.