Lol, I think it would be more objective to predict in 5-10 years... 100 years is unlikely we will live to see what miracles will happen to bitcoin, and I agree, need to accumulate. Accumulate and soak in bitcoin to earn a retirement or retire without having to work. Given the turmoil in the economy right now, I think we'll soon see bitcoins worth over $100k in 5 years, the end of the year at the earliest.
It is too much to ask your vision about what will going to happen in bitcoin after a 100 years I mean anything in this world is unsure to whatever it may happen but let's just think about the technology that we have today that have been introduced in the world for a long time ago but it only materializes at this modern times. It is much more realistic to predict in a range of 5-10 years but a 100 years is beyond my imagination. I guess we should enjoy what benefits we have gain from bitcoin today and let's make the best out of it by preparing our future through the help of these platform.
No one among us will be alive to see what will happen to bitcoin after 100 years. So whatever any one predicts about the bitcoin future, after 100 years, it cannot be validated by us.
One thing is for sure that we will not have fiat currencies after 100 years.