You are absolutely right, and thank you for that. I will try to help as much as I can with understanding the purpose of fuel, feel free to correct me.
So, fuel is an in-game economy introduced as the foundation.
The system works like this:
Layer 0: Zero = fuel production. There are two options: spend it or sell it (and buy it but mostly for speculative purposes).
Layer 1: Overworld = Players/Buyers, they have two options: hold it or use it (basically playing the game). They cannot sell.
Layer 2: Arena = the endgame for Layer 1, or the 'dope' stage, helping to maintain sustainability across all layers.
Layer 0 can be integrated into other layer as well. Progress is ongoing, but eventually, they will have to follow the same rules(i think?). Also, Layer 1 players need to buy land to produce fuel themselves, or they’ll remain buyers forever.
Do you see how one-sided the buyers/sellers dynamic mostly is? It’s not like other markets, at least. Could that be a problem? Probably.
Fuel is the base currency economy whose only purpose is to create an in-game sustainable economy.
ETH is the currency behind fuel, and 1 ETH = 1 ETH- as long as ETH remains deflationary, it’s even better than Bitcoin (or the US dolla, brrrrr).
You can speculate on both, for sure, but I’ll leave it to you to decide which one is better to speculate on.