It's true, sometimes we don't know the exact function at this time regarding the existence of cryptocurrency for several fields such as education and the others you mentioned. Maybe currently cryptocurrency only serves other purposes, and its implementation in several fields has not yet been thought of.
But did you know, in the past, the front camera of a smartphone was only used for selfies... but now the face unlock feature has become more popular. Initially, no one thought about it before this innovation came through the thinking of human genius. So with the front camera, several other features will open by themselves.
Likewise with cryptocurrency, later we will know if its adoption is widespread enough.