I wonder how many actually held that amount till 2013 when the price increase happened.
Would have been tempting to sell those, even when the price went up to 100$.
To be fair, the price increased plenty before 2013. The price increased 600-fold during the 11 months from OP, dwarfing the 100-fold rise from base to peak we saw in 2013 (remember, OP was following a 3-week, 10-fold rally so many of these holders would be looking at a 6000-fold rise in 1 year). The temptations to sell at certain points were greater back then as volatility was higher and future adoption was far more uncertain. I can attest to the temptation of selling at parity (1 USD/BTC) when you're sitting on many bitcoins that you generated with a single desktop computer or bought for peanuts just a year earlier.
The price was around 80$ in 2012, was still a very good price back then for early adopters.
I wonder if satoshi sold majority of his coins then.