This is because the binance yesterday seems to be the stolen money event happened, but it is well known that binance is a big exchange, so most of the trading volume of the world are in binance exchange, so when it is a problem, will make a lot of people panic selling.
Yesterday, hackers used surprisingly well. They bailed the entire cryptocurrency market through binance, brought in all the cryptocurrencies through a single coin, and those who panicked did not have confidence in the cryptocurrency, so they sold and led Larger panic, there is now this scene.
when many Altcoins is experiencing red. this indicates that the state of the coin is decreasing. this will be very risky if the decline continues. so the effort that needs to be done is to hold and support for its development to keep on increasing and so as not to experience deep downfall.