Instead of tracking a 10B market cap, you could track something like the market cap of various tech and money transfer companies. You should also use all 21 million coins in your magic number, since people already know they will exist and the market has theoretically already corrected for their presence.
Market Cap = 1 BTC price
MoneyGram = $36
Western Union = $440
Twitter = $1,380
GLD ETF = $1,538
SPY ETF = $8,231
Facebook = $9,517
Apple = $29,454
Gold = $352,525
Tax haven bank accounts = $1,428,571 (Source:
RunToGold.com)
there's that much money in tax haven bank accounts?
never knew.
just to be clear, that's just money sitting in the bank right, not invested or anything, liquid cash?