Awesome! That is a real answer rather than goldbug sales propaganda! I still don't think gold will hold value very well outside of the context of our current prosperity though.
It definitely won't be anywhere near as valuable but I think it's easy to underestimate how important it would be to rebooting civilization. It's malleable, relatively chemically inert, resistant to corrosion, solders well, and can be easily used to gold plate other objects without a modern supply chain for reagents. There are lots of cheaper industrial replacements available now but once those are gone, its practical importance goes way up. Recycling all of our gold crap is going to be easier than restarting titanium mining, for instance, and that's pretty critical to getting modern industrial chemistry and biology working again.
My recommendation if you survive the apocalypse is to immediately go take control of a hydroelectric dam. They're usually easily defensible and as long as you have megawatts of power, restarting civilization is relatively easy. As long as the turbine windings haven't melted, they will last for years. Preferably find a dam that used to power a smelter on site so you can recycle all the now useless cars into new metal. That would quickly turn you into a post-apocalyptic kingpin.
You can also subjugate downstream communities by threatening them with sudden water releases. Bonus points if the only approach to the dam can be washed out with a release.
