So I predict that a big portion of those early Bitcoins that have not been moved, will never ever be moved, because the wallets are just lost.
I can attest to the fact that I started CPU mining in 2009 when I first found Bitcoin, and then when I found out they were worth nothing and there was no way to sell them, I removed the program. I didn't get back into it till the end of 2010 when they were actually worth something. My guess is that I didn't CPU mine for more than a day or two, but those coins I earned will never be used again.