The stock arket was crashing so much that they shut down and did not allow people to trade anymore. This made it seem that the stocks did not crash so much but they would if not for the external influence.

You can see how traditional markets work. They decide when you're allowed to sell or not. You're just a sheep to them.

Bitcoin is only as decentralized as the Internet. If they shut down the Internet what will you do? That's what people who sell are afraid of. The total shutdown!
Have you noticed that the biggest crash happened after Trump said that the US will close its borders?