BitMEX is a Bitcoin platform and other Bitcoin based Bitcoin generators. BitMEX is a wholly-owned subsidiary of HDR Global Trading Limited, which was formed in 2014 by three financial, commercial and technical specialists, including Arthur Hayes (CEO), Samuel Reed (CTO) and Ben Delo (COO). BitMEX was officially launched on November 24, 2014, was one of the first trading platforms at the time. BitMEX is one of the oldest and most trusted Bitcoins
Not sure if you dubbed this from somewhere or you know exactly what you are saying with that your last statement, about bitmex being one of the oldest and most trusted Bitcoins. Oh! I guess you forgot to copy the rest!! 
Bitmex is a marginal trading platform and over the years has been able to gain some good reputation, so trading safely on bitmex, is dependent on your ability to keep your account properly secured and your ability to know how to trade effectively.