Bitcoin is complicated to explain to an ordinary person who is not an IT or gadget or technology enthusiast, imagine explaining the principle behind block chain, mining, etc etc to an ordinary person who really doesnt even understand internet basics.
If it is not explained properly or they are not well acquainted with the technology in this generation, then it will be too complicated for them. All the talks they could get may not be enough. They must still research more themselves. And this means that they have to be updated with the technology advancement we have today. It will be real complex for them if they not understand even the basics.