Bad and good altcoin depends on how you manage it lol. Even though you think that altcoin that you currently hold is included in the best category, but if its value in the market continues to decline, you should immediately sell it. Do not keep quiet and hope the price will return.
It surely I'm not like that. Though having such action will save us from losing it today but, what if it soars high by tomorrow? Will you buy it again?
To know that fact that these coins I am holing now have a huge possibility that its prices will pump anytime, I will keep it even the price will dump today cause I know and I believe that I'll paid off in the future.