At the moment, and looking at what's happening on the market, you only need to buy coins as the price is very low and it is a good opportunity to earn in the future.
Yes, you are right and I agree with your opinion. Now the Altcoin market is experiencing a considerable decline. But, now is the right time to buy the Altcoin that you choose And after that, hold until the Altcoin price rises again. Don't waste this opportunity to buy.
But I also agree with you that this is not a very good time for you to sell your coins because the market is low and you will sell at a loss but if you hold or buy the crypto that you want in this period, it will be very profitable because the price will rise higher than now.