Trading is very risky and not for people who are planning for their retirement, because whatever strategy a trader comes up with, he will run at loss in the long run. This is because a little mistake can make you lose all the profits that you have made for long in one trade. An investor is that person who is buying bitcoin regularly weekly or monthly to grow his bitcoin stash and hodli for long. Investing is more easier than trading with low risk.
Trading is not most favorite choice of the elderly who want something safe because if they make mistake, lose money, they will not be able to work and get more money to recover from it.
The elderly are different than the young, who have a lot of time, and strength to work for fixing their mistakes. Consequently trading is not for the elderly and they will look for something safer like investment into pension hedge fund for example. It's can be one of explanations on Bitcoin and cryptocurrency demographics that are very skewed to the young, because the elderly don't like Bitcoin and cryptocurrency as in their view, these things are too volatile and risky.