It is unlikely that we will be able to teach the older generation to use Bitcoin and other cryptocurrencies. It should be admitted that this is no longer their technology or their time. It is generally accepted that a generation changes every twenty years. Another ten years and the new generation will be completely ready to work with cryptocurrency, and the old generation will gradually leave for another world. Therefore, nothing needs to be changed. Let everything take its course.
That's certainly true, mate. Since old people are reluctant to change, young ones will take the world by storm. As time passes by, most (if not all) people will have heard about Bitcoin (or know how to use it). As you've said earlier, we need to let everything take its course. Needless to say, there will be some old people that will find Bitcoin interesting for their daily lives. They will take their due time to study all about crypto/Blockchain tech over various educational materials such as Books, Magazines, and even videos on the Internet. The hardest part is making old people believe in Bitcoin, instead of making them understand how it works. Being accustomed to physical cash for a very long time, will make you think twice before changing your way of life.
In the end, young people will become the "technological generation" embracing digital payments in every way. This will make governments' and central banks' lives easier as everyone will know how digital currencies work. With this, CBDCs will be able to launch without any hassles in mainstream adoption. Ultimately, the old generation will be "phased out" with the traditional monetary system backed by cold, hard cash. Just my thoughts