i decide to sell my altcoins. when i noticed that i have a good and high profit to me. when i realized that the value of my altcoins doesnt rise high more. and lastly i decide to sell my altcoins when i really needed money. even if it low or high when i need it then i sell it.
yeah when you need cash you better sell it. actualy in cryptocurrency you can earn good profit not only buying but also selling in some point.
You should focus on making regular profits and that is possible only with trading and its also better then only holding your coins as holding will never give you regular profits so whenever you are making some profits without waiting longer you should sell your coins and buy them back price goes down again.
I think it is only the matter of difference in strategy. One may want to get regular profits so they must have to indulge themselves in trading, especially day trading. If you have enough money and want to use extra money then holding is amazing as the prices always tend to go higher. Stick to your strategy in either cases.