For anyone that is just interested to invest and make money from price increase, it's very easy and simple to unknown Bitcoin. The only thing the person need to do is buy when price is low, and sell when price increases or when they have gained enough profit. The other technical part of Bitcoin is what can actually take some time for one to learn everything, but investment is the simplest part of Bitcoin.
I think even understanding how bitcoin work is easy as well, but the developer stuff is the only thing I find hard to grasp, especially if you're not adept programmer, with low level programming language.
but so far understanding how blockchain works always a piece of cake.
but one thing for sure the average joe can only understand the basic that bitcoin is digital currency and I think they're already fine.
moreover, most people are more interested in the aspect of investing and trading anyway. like how tech stock investor mostly doesn't give a damn about the underlying technology the companies were offering.