Yes, it's foolish to buy altcoin at this time. I think most of the coins will disappear in this bear market, and the correction will continue for a long time. I think only Bitcoin is worth investing in, and no other coins will be bought for the time being.
i think in this time, the market is being dumped awfully that we may think altcoins will soon die but i think there are many altcoins still worthy for long term like NEO or RIPPLE,... those of altcoins with unique characteristics can have the chacne to be pumped in the future and get more attentions from investors.