In a matter of conviction I will say every of the age grade above is likely to be convinced equally, it most likely depends on the personality of the person and not their age. It could take you most to convince a 20 years old youth to put their little money in to bitcoin or any other cryptocurrency yet easy to convince my mom who is over 46 years and above.

Now given the scenario of who is convincing them ? it's pretty much a very simple task depend on the person.

But generally speaking it's more like, the younger generation is mostly attached with the new techs like bitcoin or crypto because they are more of explorers than the aged ones.