Download every important piece of media and software (including Bitcoin Core!), stick it onto extremely durable storage devices, and launch them into space. Who knows, some alien civilization might discover them eons from now.

I'd want everyone possible to be happy in their final years. People who are wrongly imprisoned, people who are lonely, etc. Perhaps I'd donate the remainder of my stack to these causes.

I would probably move myself and my family to some remote wilderness to appreciate nature, which I probably have not done enough of in my life. I'd cut off all distractions, no need for any of that.

Would continue to learn about all the things that interest me, and study stuff that I've always wanted to learn but never had the time for.