OP's post would be more coherent they were to divide the total global money supply (M1) by the number of BTC.
If you were to use Narrow Money (M0 + M1) supply, there's approx $37tln. Broad Money (total/M4) supply ~ $91tln.
Additionally there's ~$215tln in global debt and ~$217tln in global property.
Lastly there's derivates which are estimated between $500 trillion and $1.3 quadrillion.
Narrow or M1 = $37 trillion / 21 million (total supply cap BTC) = $1,761,904.76 per BTC
Broad or M4 = $91 trillion / 21 million = $4,333,333.33r per BTC
Global property = $217 trillion / 21 million = $10,333,333.33r per BTC
I'd calculate derivatives however it's basically pointless as that money doesn't even exist, it's just pieces of paper saying IOU. There's something like 100x the amount of gold in IOUs than there is real physical gold. So you can imagine the shitshow that will occur if somehow the world goes into disarray after a hugely deflationary event.
By the way, the calculations are just raw values based upon total money divided by total supply. It does not include any assumptions based on demand as if we do enter a global virtual currency and the odds are actually in BTC's favour (it doesn't die and replaces all currency, woowoo Utopian idea) then you're splitting 21 million coins amongst 7 billion people (maybe less by the time virtual currencies replace cash).
That would be 1/333th of a BTC for each person if handed out equally. It's about $20 worth at the moment.
Knowing that society isn't like this, $100M/BTC wouldn't be ridiculous considering ideal perfect conditions. Whether it gets anywhere near is a completely different scenario, most models pose $100,000-$500,000 to be the top at the moment.