Just hoard some Space Marine Dreadnoughts.
Those muthas will never go out of style, and eventually they'll have some retro value once they inevitably change the designs again.
( Mr. Tea 'ulmmm'/'mmneurgh', Fri 8 Mar 2024, 10:17, archived)

Being a weirdo hoarder I've actually still got most of my collection from my youth (early 90s). Looking on Ebay, I'm sitting on quite a lot. Utterly absurd some of the prices it changes hands for now.
(Oooh_cuntroversial Where have I been?, Fri 8 Mar 2024, 10:29, archived)