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 I would build a personal budget app which tracks the prices of everything in dollars and allows a switch to sats to unmask that saving in sats drives personal costs down. I would give it away for free. 
 In spreadsheet form at least this is very doable. 
 For sure. I've played with various spreadsheet versions. With a couple devs the idea could pop. It really needs the right UX and product manager. I believe the idea can grow into something powerful. Human Action via pure data, can drive both behavior that is self preserving and cooperative.