davorcoin, bitconnect and other lending coin that are red flag is this the right time to buy this coins?

Yea it is the right time to buy when price is down and with red flags.But even you saw the red flag to that coin ,it doesn't mean that coin is good to invest. It is up to your choice. I suggest do searching the best coin to buy before you jump to it. It it risky but profitable if you choose the right coin to buy and invest.