Adoption of crypto by elderly people

Hello everyone, hope everyone is safe.

I was explaining cryptocurrency to my father, who is 78yo, and his major concern regarding it, is in his words "if it fails, I don't have a door to knock on". Surely the descentralization concept sounds weird for someone who's entire life is used to centralized systems, but that's not what I would like to discuss here.

His concern made me think on how the adoption of cryptocurrency will be for elderly people. In general, older people have more money reserve than young ones, and I was wondering how will cryptocurrency draw attention of them.

Cases like Warren Buffet, who disbelief crypto can be converted to believers?