Supernote is an eNotebook and is writing focused rather than book focused, but it uses a stripped down fork of android and you can easily side load other android apps onto it including e.g. F-droid. You can use it without an account and with no network connectivity (loading content via USB), or your choice of cloud providers, including recently self-hosted storage.
I mostly read library books so unfortunately I have to go through Kindle, but you can use the Kindle app on the device and it works pretty well. Not as many features as a dedicated device, but the basics work great.
Major caveat: it’s not backlit so you need a book light/lamp/headlamp, which is a big pain.










I think the “don’t hold it don’t own it” advice does make sense for a small amount of portable gold if you’re considering a scenario like a fascist government taking over and needing to flee the country with any wealth you can, predicated on the assumption that other countries are still relatively stable.
There are also a lot of silly people who hoard pounds of gold for apocalyptic currency which you’ve pegged.