Since all cryptocurrencies are linked to Bitcoin, most of the other cryptocurrencies fall following Bitcoin as the price of Bitcoin declines, which of course is a big drop. As for why it's a good time to invest in cryptocurrencies, you can get more coins at a lower cost because all currencies are falling.
Agree with u 100%, also Chinese New Year 16th of February, have patience! On 26th of January hackers stole $530M from Japanese crypto exchange. So couple of bad news, u need to go through. Patience all that matter