I'm not sure if you will be able to donate your remains to someone to mine Bitcoin, but there may already be a possibility that you will be turned into compost and that someone will use you to fertilize roses or vegetables

https://www.ecowatch.com/washington-human-body-composting-2637805371.html

I just hope I don’t end up in the compost prematurely -> https://www.imdb.com/title/tt2290065/