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.
There is nothing wrong with what you have said, most of these altcoins never get back up when they fall. Sometimes you will see some groups and all they do is look for altcoins to pump and dump, and if you keep waiting, everything will be dumped on you and you become the loser. I dont play with any good opportunity I get to pull myself off from any cryptocurrency I think might be bad.