It's just for a while, look at the bitcoin chart right now, the price is slowly recovering and it's definitely better than the condition when this post was created. If you already know about Bitcoin for a long time then you should know about this and this situation is pretty normal imo.
Yes, this is normal if we're going to take a look at the past years situation of the market. And if something is still surprising the new investors of the market, they'll get used to it someday.
You will see sometimes it would crash by 10% and then it would go up by 10% as well in random day, you should pretty much familiar with it.
And much worse could go more than that but on the other hand, it can also go up more than the decrease. So yeah, everyone will be familiarized on how the market goes.