So over the last few years we keep hearing Russian hackers hacked this bank or e commerce site, etc. Why don't they just go after the exchanges. I googled it and apparently Nasdaq admitted they were hacked. I know some stuff but not at that level. How do the exchanges protect against that or do they get hacked and we never know. I just thought why does everyone commit all forms of white collar crimes, ie. ponzie schemes, insider trading, front run, etc. Why do all of that. Why not just hack into one of the exchanges and front run or siphon $$$ off. ??