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?

If you see this coming, I suggest you have to invest or buy again your current coin because you will have all the advantage if you bought coins the its lower price. Why? the price of the crypto market is so volatile probably the market will rise again and if that's happen you will have a huge profit margin.