Okex is one of the great exchanger.
Youre lucky if the bounty coin are registered on okex it has possibilities that will have a continuous circulation.
But all exchangers are prone in hacking thats why you cant all trust them. But for now okex doesnt have a huge issue so you can stick with it
I agree I think Okex is also a good exchange place, a few days ago I saw my friend make an exchange on this exchange and he didn't have any problems, and I think it's also easy to understand, although I haven't checked myself but my friend is very trusted this Okex and advised me to use it too,