Thanks again to everybody for the kind words in this thread.
>..<
Bitcoin and a persons age is an interesting topic, and maybe I should put together some thoughts about it for the over 70s. You can't just look at chronological age, but have to consider mental and biological age as well. Then there are the health issues, and financial status. I have a friend in her 90s, and she has a spare £50,000 in cash in the bank, and she is not sure what to do with it. She was going to give it to a donkey sanctuary, but I have discouraged her from that. In fact Bitcoin could be an interesting intellectual stimulus for her, and a way for her to gain some computer knowledge, but she is unlikely to want to spend the time, and would rather read about old naval and military battles. I suggested gold Britannias, bur she considers gold to be too speculative.

An interest in Bitcoin has been good for me, as it has helped me to understand the concept of hard virtual assets, and it seems that most people in crypto don't really understand why Bitcoin is the only hard virtual asset in crypto. It is a hard asset because it is not centralised, and is not dependent solely on its utility for its value.
Gold seems to be less speculative than bitcoin, even though bitcoin surely has a higher upside, but I would not recommend any 90 year old into putting much if anything into bitcoin. Surly, if she is concerned about a donkey sanctuary, she might give part of her £50k to a donkey sanctuary, but maybe she could put another part of that £50k into a bitcoin trust for donkeys.. Of course, some things can be more complicated than preferred. There are likely not too many 90 year olds that might want to learn about bitcoin if they have other interests, too... so I find it difficult, whether someone is 90 or some other age, to attempt to get them interested in a topic that they have not already expressed interest.... so for example, if you mentioned bitcoin, and the 90 year old does not perk up with interest, but if you mention donkeys or military ships, or military battles, then it would not be fair to impose your own interests onto them, if they are not even showing any interest in such bitcoin topic.
Personally, i doubt that bitcoin really needs much marketing, and with the passage of time, including the Lindy effect dynamics, value and even mindspace is going to continue to gravitate in bitcoin's direction.. but it still could take quite a bit of time, and surely a large number of people seem to pay way more attention to bitcoin during exponential price explosions, which is not really our current state of bitcoin affairs, but could be something that happens in the coming year or two..... I suppose many expect it to happen, while such major question is still waiting to play out. I would feel bad for the 90 year old, if i was pushing bitcoin on her, and then her investment goes in the opposite direction during her remaining years (with a pretty BIG risk of deteriorating health during such coming years).