In crypto exchange, I prioritize security, low fees, good customer support, margin trading availability and easiness of use. Based on these criteria, I decided that cex is the most suitable exchange for crypto trading. Currently, margin trading is disabled because of their new broker launch ( https://cexbro.com/ ). Therefore, I am waiting for its opening. Furthermore, they promise to provide benefits for registration and new advanced features. I think it will be something like Coinbase Pro, which is mainly focused on experienced traders. Anyway, we will see soon.