[idiocrat]

Legal insider trading. Prominent example are US Congressmen.

Personally investing into specific technologies (e.g. NVIDIA) and then passing legislation to promote those technologies benefits everyone, although asymmetrically.

[elicash]

Insider trading isn't legal. See the STOCK Act, signed into law by President Obama in 2012. I am very aware people will say this is unenforced.

[peyton]

Insider trading is completely legal if registered and reported properly.