That's bad news that can destroy the dominance of Bitcoin.
It can even reduce the price of Bitcoin itself.
Hopefully this event will not happen again in the future.
Indeed, I am also hoping that this wouldn't eradicate in the future because this would really bring negative effect to bitcoin price. If US have strong enforcement about those Iranian holders, then I think they had a problem with these people.
There will be possibilities that they have been committing crimes like money laundering or worst is they've been scamming a lots of people.