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
This is not really. While many people know that bitcoin is an asset worth holding when there is a lot of political upheaval, most people will use fiat money to buy Bitcoin. Then the market cap of the whole market will increase and certainly the alts will benefit. but it will certainly be affected by the decrease in time, so now is not a good time for you to hold alts. We should look at bitcoin more and try to earn it a lot. 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