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A dream of inviting our old citizens to bitcoin will not be possible if we ourselves lacks the fundamental knowledge about it, the best way to properly explain things is to first learn and use it. There's we can formulate various analogy to correlate terms and to lead them in the right path as they engage themselves with bitcoin. I believe that there's no boundary of ages for people to use it, that is why I like to learn and use bitcoin.
If we want to provide education, we should have a strong knowledge base and experience. If we don't have that then we cannot provide information and education appropriately. Especially if we can not prove the results or real profits, it could be only considered nonsense and gibberish.
Indeed there is no age limit for learning. As long as there is a willingness, supporting facilities and infrastructure, anyone can learn and try to benefit from cryptocurrency.