We know already that the old people doesn't have the capability to memorize things because of their age, their are tend to forget easier compare to those people who are around the 30's or 40's. It is hard for them to teach Bitcoin especially for those old people who are not techy or not even exposed to the technology since on their prime, things like this doesn't exist at all. There are some old people too that will just ignore it since they are old already. They don't have any time or at least interest to learn it.
In my place, I'm the only one who knows the basic things of crypto and I'm not teaching it to any of them. Its not that I don't like but I don't feel that they are interested on it too.
basically rich seniors are still into technology because they run a business and hold much money but for those who are not lucky to have a wealth like them , we can only see this seniors resting on thier home and have no interest to technology but this can be changed if they still have the passion to learn it . its not yet too late as long as they are still healthy and can hear , read without problems . you wont know if you dont try mate , but its better if youl try to educate people on your place