Block Exchange is a centralized cryptocurrency exchange that was founded in Switzerland. This exchange was constructed on the NEM blockchain, which implies that transactions would be quick and simple. Looking at the exchange's activity, I wouldn't say it's still operating. Although registration on this exchange is feasible, I do not recommend that anybody trade on it. The telegram group was last active in 2020, which is a long time ago; the assets exchanged here are unusual and do not include Bitcoin, Ethereum, or other prominent altcoins. There is no information available about the exchange's trading volume, so dealing here will be risky!