It was not a mistake at all. It was a well planned and executed attempt to get the market to plummet by having Jamie Dimon abuse his position as CEO of the largest wall street bank.

I personally find it to be a combination of insider trading and market manipulation, so it would actually make sense to have him sued. I vaguely remember having read about certain people that were considering doing that.

I however don't think it will have any impact anyway. Bitcoin's lacking regulations offer these financial institutions enough freedom to do things like this. Even if so, the SEC should act accordingly in this case.