Comment by hack3r_n3ws

I don't think you understand what is being discussed. ACID compliance has nothing to do with "security". It's a matter of transactional guarantees. MongoDB offers none because it is not ACID compliant. That means that transactions can silently fail, partially commit, execute out of order, etc. This is an EXTREMELY serious and complicated issue. And I would not do any banking, trading, etc on a non-compliant database.