I do not think that he is untouchable, no one in the market is. He is just lucky that no one is yet after him, the US SEC as we all know that when Trump won, he wants to be crypto friendly President and so most likely, they will that a low profile on hunting this projects.

In any case though, if someone complaints, maybe they will go after him. So let's just wait, if there will be a entities that lost money then he should try to go and proved his cases so that they can go after Justin Sun.