So apart from all the geopolitics of it this line is interesting
"few seconds to pay in bitcoin, ensuring they can’t be traced or confiscated due to sanctions,’ Hosseini added"
Maybe I'm ignorant of Bitcoin but isn't Bitcoin transactions recorded in a public cryptographically signed ledger? Isn't that literally the opposite of "can't be traced"?
There a whole industry called on chain analysis that do this sort of work.
And if you knew the manifests (quantity of oil) for the ship, just the value of the bitcount transaction could be used for tracking.