Risky stuff, Satoshi Nakamato has a big part of all the bitcoins. He can dump it any time.
I thought about it, too. We do not know the main owners. What can happen.
I agree with you but you should understand that this is bigger than even satoshi alone now. If he is ready to dump there are so many people ready to gulp it as they believe in the future of the cryptocurrency.
However, I do not see this happening anyway cause how would someone want to destroy what has been built when the chances of it getting bigger is still possible. Like you have said, even if satoshi dumps, worst that would happen is having the coin fall for a while and then we have it back up again. Good time to buy at dips isn't it?