adoption is happening now. Bitcoin has not become the preserve of the new millennium generation or the youth.
I saw early today an old man (about 75 years old) wearing Bitcoin shirt.
If you think that adoption means someone wearing a T shirt with BTCitcoin printed in it, if so i will go around printing some new T shirts and starts distributing them for free I saw early today an old man (about 75 years old) wearing Bitcoin shirt.
.I tried to explain it to my parents and several other adults. They do not care about this technology and do not believe in an alternative of banknotes.
You cannot force anyone if they are not interested in learning about new technology. Many might find it difficult to understand the concept of a decentralized currency and for that you need people who are open to understand new things even if they are old and anyone who was active in stock market will easily migrate to the cryptocurrency market.