Actually people's learn from mistake. Those mistake I did began, I am realizing now. That's why I want to share it. Perhaps everyone will not agree with me. Every traders have few favorite coins. It's normal fact, but don't love too much any coin it's my logic.
I don't want to mention but I have lost many btc just one coin. Just think it will go more up and didn't sold. In a result price dropped 4X. So I want to say don't love any coin, just sale when you are in profit and go another coin or wait for drop price again and buy it. It's very difficult to recover once drop an Altcoin. One more thing, don't invest your all fund on single coin. It will loss more, who know it will up or drop.
Some altcoins are worth to invest, though i see your fault is that you only invested on a single coin which is a bit hard when times like this most altcoins will starts to diminish due to the bearish market. I think it is better if you just hold it more and wait for the right time to sell it. It is not worth to sell during bear market.
On investment world it would really just like a gamble.You would really need to risk in order to earn something in return but somehow you can set precautionary measures that will really give you the
chance to hit the right altcoin or project if you do make proper research. Just don't focus too much or going all in because this will surely put you into difficult situation once the coin had dumped.