By Luc Olinga The cryptocurrency exchange has entered the non-fungible tokens market at a delicate time. It is a bold bet in which Coinbase (COIN) has embarked. The crypto trading platform has just opened its non-fungible token trading platform to everyone on May 4, two weeks after its launch. But the first returns are not likely to reassure on this part of the diversification of the firm. Indeed, the signals are red or even worrying. Figures compiled by various data firms show that Coinbase has not yet managed to compete with the dominant marketplaces in this segment of the crypto sphere. The…