Young people are more open-minded, so you could say the younger they are the easier it is to convince them. THe problem is the younger they are the less money they have

Older people have been in the system for a long time and they got their wealth from playing this system. That's why Buffett and Munger were so much against bitcoin because they made fortunes from the existing system and bitcoin goes against it.
IMO bitcoin's opportunity is in people who inherited their money and are still young and people who made fortunes by running or investing in tech companies.
Who searches will surely find what he needs achievable with BTC; if not, they didn't dig long enough.