Change is constant that what theorist said. The young generation believe that cryptocurrency is legit asset which can change their life one day but the old people but old people still tag Bitcoin as a fraudulent asset. That is one of the major challenges of the age.
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The investment that is poured on Bitcoin does not come only from young people, so I can say that your concept of old people tagging Bitcoin as a fraudulent asset is moot.  Aside from that not all young generation thinks Bitcoin is a legit asset, there will be still a youngster that is conservative and still think that Bitcoin is one huge Ponzi scheme.

Bitcoin investors are a mix of young adults and seniors so I do not think that your so-called challenges of the age exist.  It all boils down to the belief of a person regardless of age, people who think Bitcoin is fraudulent both exist in younger and older generations the same way Bitcoin believers also exist in both generations.