Where was the money parked, so it could accrue that interest?
The assets were frozen by Jimmah Carter, because of the Iranian hostage/Khomeini regime takeover.
Why would the US release this money back to Iran, NOW?
What have the Iranians done in good faith to show that they are any different than they were in 1979?
If anything they are WORSE.
Both for the Middle East and the US.
These must be the “secret” side deals included with the Iran deal.