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.
Just like you I have a lot of altcoins stored in my wallet and I have no reason to dispose them for now because even they are almost priceless they can turn out into something better if the market goes well. We can't do anything on our alts now so its better to hold them rather than to sell in low price. I have confidence that they are going back to price as they were before or even something great.