You use it to boil water.

You can even dissolve the uranium in the water and use the same substance for both fuel and propellant and so capable of reaching far higher temperatures than those that would cause any engine to melt.

https://en.wikipedia.org/wiki/Nuclear_salt-water_rocket

The real question is if we'll get back hole or antimatter powered steam engines before GTA 6

It's almost a meme at this point

If I knew that, I'd probably have more important things to do than comment it here.

You could pen a carefully-worded a letter of demands and send it to some Billionaire? A bit on the risky side, but - hey, you only live once etc.