Here is my opinion.
Think your purpose of sharing it to them. For example, you want to share to your family and/or friends the things that you do during your free time or why are you so busy everytime you're in front of your PC. In other way, maybe share to them that you are earning online, and who knows they might be interested too. Start the discussion from there and think of easy ways to explain it step by step for them to understand it.
I like your opinion but my Family don't use PC or Internet. It's so hard with me !!
You are going to have a tough time explaining it, if they do not even understand the basics of computers. The best way, will just be for you to relate it to something they know already, which is the
banking system. I hope they use banks, or this will not work for them.... Tell them that all money are transferred in digital/electronic form in the banking systems... If you transfer money to people in
another country, banks will not transfer the money physically {meaning that they are not taking the money you deposited, and then transfer it via boat or plane to the other country} So most money,
is already in digital format... The same goes for Bitcoin... the only difference is, it is not going through banks, but rather one big decentralized network that are running on 1000s of private computers.
The bitcoins are also generated from this network and not by banks or governments.
