today I read the news that Iran has warned about "more serious revenge" against the United States. such statements are not some kind of joke and what exactly they can do?

I believe that 2020 began very poorly if you look at it from a political point of view.
If the disagreements between the US and Iran will continue, this could end badly. How will this news affect the market? can they start to sharply raise bitcoin at the price? if bitcoin will grow fast, then altcoins will be even worse

Its getting worse because of what US done in the world especially in the middle east but lets see if Iran will stop this revenge and will have a peace talk with US but for now this news is still hot and I hope it didnt affect much of the price. If theres a war, big adoption might happen, no one knows.