I think you're on the right track, but I think you're missing something. The figure of $454 trillion being cited as total global wealth is actually net asset value, which is total asset value subtracting liabilities. If we're moving away from a debt based monetary system and towards a wealth based monetary system, then I think you're using the wrong number. The Bitcoin network represents ALL capital value in the world. So I think it's very possible that the total asset value could exceed $1 Quadrillion, which would give each Bitcoin a value of $47,619,047.62.