Well, we certainly will need a transaction system between planets because the cost of transfering paper money from Earth to other planets will be very high. Surely, this is for the far future but it will be. On the other hand, this system may be centralized. Human kind needs to evolve until we get a decentralized system for all. I hope we will evolve soon though.
As
Pab stated that people in moon is a utopia so as decentralized monetary system is. With the presence of a governing body, a fully decentralized system will never be possible. Let alone government always wanted to get involved in every peoples pocket or by any change they can get profit in mediating/regulating transactions.
Therefore, Trump will not ban Bitcoin and other cryptocurrencies. Even before the end of his presidency, he had little left, so he would not do such harsh and stupid things.
As for NASA, they need specialists in various fields, including to protect their digital information. Most of their technical workers are not directly related to space.
Who knows, Trump's action is unpredictable, he can ban Bitcoin and let NASA adopt the technology within it. There are several talented programmer in their rank or NASA can hire one, cloning Bitcoin is an easy task for them less the mining activities of course since for sure they wanted it centralized.