So, there's about 23K addresses with > 50 BTC. You're in rare company.
And multiples of those addresses will belong to one person.
Satoshi's blocks of 50 all went to separate addresses. I guess the same'll go for most early miners.
Buy we have no idea how many people hold those 23k addresses do we?
And we never will. Lots will be companies so that reduces the individual holder list even more.
And if the 1 million bitcoins that Satoshi has is accurate, that is 20,000 addresses with 50 bitcoins right there. ;-)