I would go with anonymity and privacy. As you said, the goal consumer of this game is just normal people that do not know what bitcoin or crypto currencies are and they prefer to keep their personal information to themselves. I think only a group of people will be interested in a story-driven game that you are planning if you ask me you should aim for something addicting, simple but addicting games. Though that would be hard to pair with anonymity and privacy, I don't know. Here's the thing, I played a game in the past where you buy something and while you leave the game the profit is going up and up. I don't remember that game but that is amazing since while you have a lot of money or profit, you could upgrade your house, your PC, your room, etc.

In that game, you could start the player as one wanting to mine bitcoin and maybe 100 to 200 sats are enough profit of it per hour. Then there is this upgrades in his PC where it would speed up his earnings or profit. He could upgrade his PC, his house, he can even buy a miner to more develop his earnings. He could switch to solar so he could reduce his payment in electrical bills. You could add a feature where a hacker can hack his computer, if you will be doing it online, you could match up to other players hacking their PC in that game with a simple mini-game. This is just an idea of mine, hope it gives you something helpful.