Instructive.
Coffee beans have been my 2nd-level commodity of choice.
Clean water, food & medical supplies are inherently much more valuable to life than gold.
Then again, if you don’t prioritize life, you might choose gold. Hmmm.
Coffee beans have shelf life issues and aren’t sufficiently compact. Plus, coffee prices are very volatile.
Single-malt scotch whiskey is a better solution. It only goes up in price, is immediately useful, and has recognized value in exchange. If the S doesn’t HTF, you can still enjoy it twenty years from now.