i was surprised to see the market today, everything fell in a short time, bitcoin fell around $1000 very fast and looking at coinmarketcap, all coins are red. a few days ago bitcoin rose slowly, but today was very surprising. What happen today?

your account is almost 6 years old and posting in this forum for long years but yet asking this kind of newbie question?
bitcoin does not even drop 20% and you are already alarmed?
when there are so much dumping and pumping for all those years that you are here and supposedly has the idea what this happened.
FUD everywhere. Binance is the major party that was making the market feel panic today. i don't have words to describe it but everything will be going so badly these days. In my opinion that if this gonna be another bearish week.
Let's see a good news to come at the end of this week.
this Binance and Government drama is taking place , as there are whales and manipulators that wanted to shaken the market so they can bag money again.