It was American money to begin with. Many (many) billions of dollars have been invested in civilian salaries and infrastructure, especially in building the modern Kabul (from literally ground up, as was a sea of ruins after the 1990s, now the city is even in these hills around).
Instead of "blocking" their money supply the US should take and spend it. Spoils of war.
It was American money to begin with. Many (many) billions of dollars have been invested in civilian salaries and infrastructure, especially in building the modern Kabul (from literally ground up, as was a sea of ruins after the 1990s, now the city is even in these hills around).