Presidential orders alone are ultimately just indirect measures. They can only instruct regulatory authorities to strengthen investigations or tighten supervision. Even if we try to do something like "limit transaction fees for cryptocurrencies to 10% or less," it won't become law legally unless Congress amends the law. There is a high likelihood that it could be halted in court. In other words, changes at the institutional level absolutely require movement from Congress. The president's sole discretion has its limits.