i opened coinmarket place and i saw bitcoincash coin skyrockted to 527$ about 76% increase form its actual price
It's just a hype, it would gradually go down overtime. This only proves that bitcoin cash has no chance against bitcoin, bitcoin will forever be the king of coins and bitcoin cash will just be considered like any other altcoins out there.
Yup in one day it went that many high means definitely it will come down. Those who bought last time means when it arrived this coin market and waiting for the good price. This is the best time to sell your coins and get your investment back. Becasue don't know again when it is going to dump.