They have chosen the weekend not to disturb the stock markets. They may pull that off when they get inside support as the corruption of the regime has made it unpopular with business class and the middle class. Trump may achieve another 'Venezuela' short war.
I'm very skeptical that external attacks bring about a resurgence of domestic Iranian protest resulting in a tidy regime change. I think the downward lurch of BTC tells you how it's going to go, because Trump's mouth is writing checks others are going to have to cash and there's a lot of contradictions involved.
How is he guaranteeing immunity to members of Iran's Revolutionary Guard if they do nothing? Likewise, if he's telling the general Iranian public to simultaneously rise up and stay home, how does he plan to manage the hoped-for happy ending? In the event they succeed and topple the regime, are they just going to let bygones be bygones with the suddenly displaced IRGC while also giving Trump the keys to their treasury?