Some what ifs:
If all the Bitcoin now in existence (11 million) were of equal value to the annual world wide gold production (2.7 kt...about 2.7x10^9 grams{Wikipedia}...$50 / gram), then
BTC1 would be worth $12,000.
If this years production of Bitcoin (btc inflation rate is about 10% now...25*6*24*365=1.3E6) were to equal 1 yr gold production (gold inflation rate is about 1.5% btw), then 11E6/1.3E6~=10....so, 1 Bitcoin would be worth $120,000.
If all the Bitcoins that will ever exist equaled all the gold ever mined (about $10 trillion), 10E12/21E6=$500,000/btc.
If you add in silver and platinum...you get the idea
So, yeah,
BTC21 is a lot. Maybe I should hit up dailybitcoins.org...their 1/100 of a m
BTC payout might someday be worth $5