If you want to invest in a difficult market like now, ETH or BTC is the first choice for you, maybe the best option is to focus on selling or buying these tokens. mind the other coin.
The best option is to focus on selling? I think you have a wrong decision, look at the situation of market it's still in a low and not fully recovery from the last dip. The great decision for now is hold your crypto and buy altcoins that had a good potential.