Upgrade Python or get a Beluga?

In the title, really. I'm grinding credits with passenger missions at Ceos. I'm currently flying this… https://s.orbis.zone/j45p

I know most of it's modules are garbage, but it does exactly what I need it for. I have 118M cr and no particular goal for the cash I'm grinding. I don't really have a need for the Python other than the passenger missions, I could easily trade it in for a Beluga and still have cash for a few decent parts. In theory that would increase my earning potential. On the other hand, I could keep using the Python and sink some cash into upgrades for it. Or, I could just roll with it as is, and keep banking the credits.

For the record, I'm not saving up for anything special. It's just an expensive galaxy to live in and it's nice to have a couple of credits to rub together. What do you think, my fellow CMDRs? What would you do?