I am not saying that age causes a person to sell bitcoin earlier than expected, but age could be a factor that affects whether or not a person has at least a 4 year timeline so that they would be an investor rather than a trader, and sure they might still be willing to trade, but it becomes risky for anyone to try to trade less than 4 years, even though people may well be willing to take those kinds of chances, which I also would consider to be gambling rather than investing, but people do those kinds of things, yet if someone is really unsure about being able to have enough resources, they may well not want to get into trading with money that they pretty confident that they are going to need in less than 4 years..
I think so too, if they are old, it is possible that the investment they make is not for themselves but will be inherited by their children at some point in the future. That way I think that relatively old age can invest for their life or death without feeling the results or lifelong investment because it is a fact that many of them will inherit investments for their children.
If the time period is less than 5 years, of course they still want to enjoy the results of the investment they make. It is possible that they will not switch to trading practices because old age may make many mistakes and of course it will be quite chaotic if they reverse the direction of investment practices to trade.