Should we learn bitcoin or not?
Ideally, we should but I don't expect everyone to understand or try to learn how bitcoin transaction works.
It's the same situation with banks, I seriously don't think the masses even know how their money is being transferred or used. They just give their money then wait.
Well for me what's ideal to study is the blockchain that lies behind the bitcoin. Bitcoin is already there,you just need to know how it works but that's not the case for the blockchain since blockchain has a lot of application. And for my view about bitcoin, even how hard we try to push this coin, this will never reach the thing that we dreamed for it, we can't use it as our daily trading means, and that will be a fact to be checked.
Should we promote simplicity and avoid complexity?
Promote simplicity and give them the option to learn about the complexity if they so desire. We can teach them the basic features such as borderless payment and censorship resistant.
It is better to have these both since everyone has their own way of understanding, people must have understand complex things rather then simple, vice versa. Is it hard to understand how bitcoin works? A one minute video can teach no, I can tell.