He's efficient at doing some financial analysis and knows what to look at. It's logical that he was able to find good deals and then exploit them.

Is he on bail for charges that were uniquely mendacious?

Or is it just that everyone in the industry that's competent breaks certain rules, and he's been targetted for being a giant asshole in a public way.

He's being charged with running a Ponzi-like scheme and being "engaged in multiple schemes to ensnare investors through a web of lies and deceit". A lot of people in his business are aggressive and less than forthright. Securities fraud is _quite a bit more serious and less common than those personality flaws_.

The second.

I didn't know about him. I made a search and found out that he challenged Chris Evans (Captain America star) to a fight!

http://www.thewrap.com/martin-shkreli-challenges-captain-ame...