It almost is, actually. The power of an executive order to control the behavior of the executive branch is untestedly unlimited.
Part one would be a note of the laws establishing the Treasury Department's mandate to regulate financial instruments.
Part two would be a finding that cryptocurrencies are harmful to the interests of the USA.
Part three would be an order to the Secretary of the Treasury to determine what businesses are involved in cryptocurrencies, and to take the following sanctions: ...
prohibit any transfers of credit or payments between financial institutions, or by, through, or to any financial institution, to the extent that such transfers or payments are subject to the jurisdiction of the United States and involve any interest of the sanctioned business;
prohibit any United States financial institution from making loans or providing credit to the sanctioned business;
(iv) prohibit any transactions in foreign exchange that are subject to the jurisdiction of the United States and in which the sanctioned business has any interest;
(v) prohibit any United States person from investing in or purchasing significant amounts of equity or debt instruments of the sanctioned business;
Form and specific sanctions taken from EO 2021-27505, from December 17 2021.
> The power of an executive order to control the behavior of the executive branch is untestedly unlimited.
"Untestedly" being the important part. There is no practical limit on the orders that can be issued but actually enforcing those rules on anyone outside the executive branch is a different matter. Also, you skipped over the parts of EO 2021-27505 where (a) it required declaring a (rather dubious IMHO) state of emergency, (b) the sanctions were previously authorized by Congress in the Fentanyl Sanctions Act, and (c) all the sanctions applied to "foreign persons", not citizens. There is no state of emergency, sanctions were not authorized by Congress, and you want to sanctions citizens of the United States and locally-owned businesses.
This is why purely from a "theory of governance" standpoint I find it crazy that Congress is even allowed to establish agencies in another branch that wields power reserved for them.