https://www.reddit.com/r/VanLife/comments/1avrsbd/rooftop_solar_tracker/
Looks like someone out there had the same idea.
They’re currently selling a packaged system for ~$5k, which is a bit pricey, but maybe worth if you’re full time on the van life. Looks like you could probably fit 2 of these units on a typical roof, obstructions permitting. Alternatively you could do one tracker and one flat unit.
It looks like ground based 2-axis tracking systems can be found for ~$500-1k, you’d just need to bring your own expertise to mount it to the roof and program the controls yourself.
Semi-unrelated: others mentioned painting your van white (which you already have) but I’ll raise you one better - consider painting it with an IR-Emissive cooling paint, e.g., https://i2cool.com/
There’s unfortunately few products on the market at this time, but keep your eyes peeled.
The core focus of early crypto was decentralization, not anonymity. Bitcoin is totally decentralized, but the entire premise is the blockchain contains a permanent irrefutable ledger of transactions. Basically everyone knows if Wallet A paid Wallet B. If you refill your wallet with anything remotely traceable, that means everyone knows YOU paid Wallet B, and similarly if wallet B has any ties to the real world, the lines are easy to connect.
That’s not to say you can’t use it anonymously, but that was not the intent and thus it does anonymity poorly.