My grandpa is the same way. Older people are stuck in their ways like that.
My grandpa has half a million in his savings currently earning 1% interest for the past decade and still refuses to buy any stocks or Bitcoin. So I also do understand that side.
However most people who actually despise and hate Bitcoin I find are sad people who refuse to believe anything in relation to Bitcoin because that would imply they are missing out on something they can’t afford to buy and don’t care to understand or research.