I think this question should be asked first of all to Elon Musk. He is going to colonize Mars and he will somehow pay off with the people who will live there. Most likely, Elon Musk can offer his Dogecoin if his passion for this cryptocurrency is serious. I think that at first there may even be a natural exchange, and then the money will still be needed. We do not yet know what it might be. This will depend on many reasons.