I get where you are coming from but this is a highly adversarial environment where huge amounts of other people's money is at stake with a history of very cleve

I get where you are coming from but this is a highly adversarial environment where huge amounts of other people's money is at stake with a history of very clever hacks. This looks like precisely the sorts of systems where you ought to raise the bar as high as possible. Certain systems may have proven themselves somewhat over time but for this I say there is always the possibility for some extremely sophisticated attack and for any other new system they by definition wont have even this proven track record.