for me there are three reasons why they do not want to invest in crypto
1. they have not known crypto
2. they are not interested
3. they are afraid to invest after losses
That is what is in my mind too they do not know cryptocurrency that much or maybe they do not really know it because there are still some places that the people in their do not know about that. And they are not interested at all and that is those elders because there are not use to that thing but I am not saying that all elders are like that and lastly they afraid that they might get scammed because there are a lot of news saying that this is a scam and a lot of rumors too that are having a misconception about the real value of this.