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
That's the fact! No one wants to keep money when a war happening, especially that is the war of the USA! But according to my knowledge, I guess Iran's government doesn't want to have a war with the USA. Because they won't receive any benefit in any case, even they win in this war! Without compensation, they still overwhelmed by the economy, and society will go down => Iran will become a lagging country, and that's enough to kill the people of Iran. 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