There will no big war between Iran and USA, that is for sure. USA is in no position to take the risk for another big war in the Middle East.
You do realize who the president of the US is, right? Right now he apparently thinks he's all-powerful royalty and that there aren't any checks and balances of his power, so who knows what he might do without getting permission to do it? He just swatted a hornet's nest, and it remains to be seen what Iran does--though they would be stupid to escalate this situation IMO.
I'm really tired of Trump. I never wanted him as POTUS, but I thought his presidency was going better than I thought it was up until this thing with the Iranians, which I'm absolutely certain is a smokescreen to draw attention away from his impeachment. And now it's clear he has no idea what he's doing.
But as far as the effect of all this on crypto, I don't have a clue. Bitcoin jumped and then fell, but it tends to do that without any big world news, so it could just be a coincidence. Oil prices rising makes sense, but I would also expect gold & silver to rise if investors really thought we were in trouble, but they haven't moved much. Anyway, I'm hoping this isn't the start of a war in the middle east. Nobody needs that.