I would not even think so far to 100 years,,, 10 years is impossible to predict. As smart as all the guys were behind Bitcoin, I am sure none of them could predict that BTC would be here today, that crypto would be so big and so controversial. They tried new money many times before BTC and none of them took off the way BTC did.
I am not even sure Bitcoin will be around in 100 years. Maybe it becomes something else, maybe something better replaces it?
When Gold was first introduced, I am sure there will be so many people by then that would not see the possibility of gold going this far, and many people will say the same thing of not being alive to know what will happen then, but those who took the step to acquire some gold based on what it will becomes in many years to come is what some generations that will never become our again are enjoying now.
100 years is too far for us to know about the future of Bitcoin, but no one knows, we might think BTC will not exist again but end up being like GOLD, we might not be alive again, but what will our future generator remember of us?