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.
I agree with you and take trading/ investment as business not for another reason. Some people already sell all asset or keep stay but we don't know whst the reason but I suggest we try to see our self, fix our mistakes and when stop loss/ take profit reached just let it go. We can avoid " hold " by disciplines meaning follow our rules/ strategy with out asking.