US senators Elizabeth Warren (D-Mass.) and Angus King (I-Maine) this week warned in a letter to government officials that Iran’s Bitcoin mining industry has created a revenue stream big enough to weaken the effects of economic sanctions.
It amazes me how little US politicians understand how the world works

US sanctions on Iran are just that "US" sanctions which means it only cuts off US from Iran not the rest of the world with 8 billion people in it.
Even funnier is that they still don't want to admit (or maybe too scared to admit) that with dedollarisation growing and with economic blocs like BRICS growing, the US economy and its sanctions on the rest of the world (aka US economic terrorism) are becoming less and less effective every day...
Crypto mining allows Iran “to purchase imports, move funds domestically and internationally,
LOL
How would mining crypto help "move funds domestically". Or maybe she doesn't think Iran has a banking system. Does she really think Iranians send money domestically using camels or something

and fund Hamas” and other terrorist organisations,
Since when are resistance groups that fight against occupation and apartheid according to UN charter and the Geneva Conventions are categorized as terrorists?!!!
It went on to say that “Iranian cryptominers are required to sell the crypto they produce to the Iranian central bank, which in turn uses the crypto to pay for imports and exports.”
Another case of how little they understand the world and Iran.

Iran's international trades is in hundreds of billions of dollars. Even if we use their own numbers in this quote, the "$1 billion total revenue from mining crypto" is like a drop in the ocean.
Not to mention that miners are not "required to" sell to the central bank. That's just an option.