What percent of people do you think are able to resist selling their BTC when confronted with huge profits they've obtained. Say 500% or more even?
It depends to the people who have bitcoin. Those people who have their own bitcoin that is experiencing a financial problem, cannot resist selling their bitcoin knowing that they can gain a large profit. But to those people that are stable enough with their lives, can resist any amount that will offer to them because they think of the future.
You really do have a point there though. There are some unforeseen circumstances that can make some people actually just dip their hands in their wallets even when they dont feel like due to the pressing need to solve the problems at hand and that simply relates to bitcoin as well. I have been there and it is just how life is, you cannot fight it. But honestly I wonder how Satoshi Namamotto is managing himself to hold all his 1+ million bitcoins.