To solve questions about money on other planets inhabited by people, you first need to create the necessary living conditions on these planets. Of course, this will be done from our planet Earth, and therefore the currency used by the inhabitants of the Earth and primarily by corporations or states that will be engaged in interplanetary transportation will be used. Only after the necessary infrastructure for normal life is created on other planets or even satellites of the planets, when a decision is made to provide them with the status of autonomy, only then can there be a question about a separate currency. We can confidently say that this question will arise in more than one generation. By that time, a lot may have changed, including cryptocurrency.