BTCI want to invest in crypto market. I am new here. Please suggested me Is it the right time to invest in crypto.
Or which one is best investment bitcoin or bitcoin cash?

You want secure investment or high risk investment?
BTC is secure one because it's the main coin and will never go wrong, because SHE is the Big Boss.
(even if there is something go wrong then there will be fork and you gain the fork out of it)
But yes for now SHE is too high to buy, but can you predicted that BTC price will go down and never pike up again from the current position?
BCH is high risk investment which is it's new baby born that copying the Big Boss (BTC).
Yes it will become high interest for this baby born price right now if it will pike up like BTC as right now.
But, what if BTC make their move that will completely fork and beat all BCH and others features?
Isn't it will make BCH vanished and because it's not the Big Boss, then making a fork from it will be ridiculous.. (Ponzy Schame)