I think this is the good chance we should hold and invest in BTC, at this time the price of BTC was more than $11,000, I think if you invest at this time, the next time the price will rise and you will have the chance to make more money!
Or bitcoin price would be keep decreasing until it back to $3k or lower. You never know when or will bitcoin back to $20k or even stable around $10k just like now
Ussually when bitcoin price increasing, most of altcoin will be fall cuz most of people are exchanging their alt to bitcoin (to catch bullish trend)