Bitcoin is still young; it's not even at 10 years old yet. After 100 years, I'm sure bitcoin will change, or it might be our future currency.
Changes will come, that is normal. Bitcoin needs to grow and make
progress, to adopt more. Now problems are scaling and fees, that will
be solved in near future, but some other problems will come.
Bitcoin in first 10 years did so many things, but what happen in next
couple years will determine future of Bitcoin. I think that Bitcoin will be
here in next 100 years, but in that no one can be sure.