I think these are very exciting problems. The bigger the problem the more creative the solution.

It took us two thousand years or so to go from using the weight of a bale of barley to represent the value of silver, bronze, copper to eventually actual coinage.

https://en.wikipedia.org/wiki/History_of_money

Maybe digital currency takes 15-years or so to work out the problems much like they did with barley to coins but it is definitely the future.