Further to my last comment. I would add that from the Iranian perspective, now is the perfect time to be starting something.
Between 1945 and 2008, the US acted as the police force of the world. It was dragged rather reluctantly into this role (because for most of its history the US has been protectionist and inward-looking) but did the job fairly well leading to decades of relative global stability.
Obama return the US to its more protectionist and inward looking foreign policy. Trump changed this up a bit, in that he sought to use an iron fist in velvet glove style of diplomacy (or threats, depending on your perspective) rather than force to keep global peace, with mixed but on the whole temporarily positive results. Biden returned to the Obama-style protectionist foreign policy, but did so very clumsily (see: Afghanistan), leading to further ME instability.
Ever get the sense that the world is generally less stable than it was in the 2000s? Yeah, there's a reason for that.
Now, from the POV of Iran Russia and China, the American policeman is asleep at the helm. Like the drunken leaders of the dying USSR, Biden is demented and his role is being done by his family and a military clique, who reputedly do not sing from the same hymnsheet. So now's a great time for the new multipolar superpower of Iran, China and Russia to be starting military shit - which they all are.
Couple this with widespread online disinformation and sowing of discord amongst the once culturlaly stable nations of Western Europe, and I believe our children and certainly our grandchildren will live in a time of declining wealth, greater poverty and war for resources. This has already begun, as we all know if we open our eyes and look around.
Personally I got my kids learning Mandarin and Arabic 8 years ago. If you can't beat 'em, join 'em and we all need to look after our own.