You speak very clear facts. Only the silly always sells its crypto currency at the time the market falls. It is necessary to understand that this is always done by someone, that is, such sitings are created specifically to make money on such unreasonable sales.
There are numbers of reasons why people are selling their altcoins too soon our out of panic or due to some situations like emergency and important projects and basic needs.
I choose to hold my altcoins because I have a full time job that supports my family's basic needs so I could hold my Crypto Assets as long as I could.