this is my take here. do kwon is just saying bs things just to get out of this chaotic situation. i don't think he can get the trust of his investors again. but the problem of suing do kwon is it would take resources also from the individuals who pursue this action, and are they ready to face that they may possibly lose as luna team can find a loophole to get out of this terrible situation? this is the problem of chasing a crypto project. the chance of losing is high because the team knows how to defend themselves because they know their code.
Only investors who have their money in UST or LUNA will have to unintentionally trust Do Kwon. They think they should continue their trust on Do Kwon leadership in order to have some recover for their loss.
For outsiders, it is hard to convince them to trust Do Kwon and his leadership after his terrible crisis management. They can create pump games and investors will have lost their capital in future. To trust, for me, it is impossible.