The IRGC is mainly interested in assuming control of shipping and charging tolls on oil right now. That alone upends centuries of American foreign policy, and sets a precedent that paves the way for a return to mercantilism.

With control over the strait, they can decide how many oil tankers get through, which is a direct lever on the price of oil, solely in their power. Further, that bitcoin fee not only affects the status of the USD as the world reserve currency, it can also much fund most of their government and effectively sidestep the intended effect of sanctions.

They don't need to charge tolls on any other kind of boat to absolutely be claiming victory with this. To say nothing of a Russian oligarch's yacht.