What a missed chance, he couldve just waited, especially since it eventually got approved, and now were in a bull run... He wouldnt have ended up in jail. But really, nothings safe nowadays, not even the SECs X account, which investors keep a close eye on since SEC announcements can hugely impact Bitcoin.
It doesn't matter if it got approved or not, he went to jail because he hacked into an account he wasn't. He would still have gone to jail now even if what he spread was rightful information. You can't just hack into accounts of people and not experience the consequences of your actions especially of someone important in the government.
If he gets convicted, hes looking at 5 years behind bars...pretty harsh. He probably didnt realize just how big the penalty is for what he did. Although, maybe he made some money off it, just not much, since the pump back then was just over $1,000 compared to the $10k increase were seeing now.
Was it not just a prank? Many hackers often do this just to prove a point and make someone a laughing matter. It certainly doesn't bode well for the SEC's X account that they were hacked. Of course, I think it says more about X and less about the account holder but the damage is still there.