In my opinion, the strategy that could help people adopt blockchain technology and crypto trading would be making an effort to educate the masses about this technology. People will only adopt something that they have a full understanding of. Campaigns and advertising the technology on social media platforms where most people are participants would go a huge mile in helping the adoption of crypto.
Educating the masses will take a lot of efforts you're left with one option which is to make the masses interested into learning cryptocurrency if you are really trying to make people adopt the use of cryptocurrencies. However I do have different opinon, the only thing that stopping crypto from mass adoption is the lack of regulation. Although cryptocurrencies is all about freedom but old people tend to be afraid of something that are not officially recognized by the government or the country they resides in.