I am really surprised seeing the current situation of the market. Approximately, all he popular coin price is drastically falling. What is it symbolizing?? Should I do invest now or wait to see what happen?

In my opinion, It's normal for the price of each cryptocurrency to fail because the market depends on supply and demand so we should always expect a change in the price value of the market. I know this may seem scary, but the only really good time to buy is when people sell it heavily.