Although I don't have much knowledge about trading at the moment but I do know that bitcoin can be the basic factor that supports altcoin to go up and down when the price changes. Today's crypto average is down by more than 10%, and this is the real impact of the bitcoin price dump.
Once again China has made the crypto market crash, this of course will not be sustainable. China has impacted the market with its regulations wherein a ban has been imposed on all crypto-related activities
[investing, trading, mining, etc] in the country. Investors' concerns clearly have a basis, they just want to secure profits before the effects of the news worsen the market situation.