I found it so confusing to understand what you are trying to define what bitcoin is, but I think what you are trying to say is that bitcoin is such a important thing and should be keep. Let's just make it in a simple way, you can identify bitcoin as online money or electronic money, this is really different in fiat currency as, there is no government included in this currency, it only means you are the one who has control on your own money. If you want to define crypto to newbie you may also add some advantage and disadvantage of using cryptocurrency.