It shows that bitcoin was never meant to be something that was built for profit. However true this is, if coins are moved what are the implications?
I don't think Satoshi is ever going to move their coins, and even if Satoshi does move coins, it would not change people's idea of what bitcoin is to them or what they want to use it for. That being said, there would be implications on the price of bitcoin is Satoshi's coins move, there would be a lot of uncertainties surrounding why Satoshi moved their coins and it will make many people sell off and the price will fall.
And if one person holds coins in bitcoin before 2017 doesn't the same person hold coins in BCH?
Yes, if you join the new chain and claim the forked coins.