Why every single crypto is down? What should one do in this case?

Many suggests its best time to buy… but is it? You buy right now and in few hours its even below that. Since months its just diving down and down.. im worried if grt will go to 0, even bitcoin idk anymore. What is happening?? Im like negative 52%

What should i do? I don’t know what i want to hear but please can someone suggest anything. Im worried if grt can go to 0, i know its my fault to buy it but i did believed in the project, even suggested it to some people. Please advice what one should do in this case.

Is it normal sentiment rn?