Seems BitMex floor has never been hacked. But I think you need to be vigilant to ensure that the floor will not be hacked in the future because hacker tricks are increasingly sophisticated.
You forget that POMZ is built on blockchain technology which means maximum protection against hacker attacks.
Yes, indeed, blockchain technology provides some protection, but additional protection will not be superfluous.
You are right, safety comes first, because the reputation of the project should not suffer. In turn, blockchain provides transparency and increases trust.