Just holding some altcoins that I've bought in a higher price and buy some potential altcoins in a cheaper price, this is what i do from now, and hoping that the market will rise again.
at the beginning you have done the wrong thing mate, that holding altcoin is not a good idea, you have to sell it when the opportunity comes and when prices continue to decline. and don't be too responsive to buy when the price goes down, because it's not necessarily the right time to buy right ?