Just simply say that bitcoin is a currency online that we can use alternatively.. unlike cardless or virtual payment online..
I think he can understand it and then the difference that bitcoin can be increase the value so if you are holding alrge number of bitcoin can be rich fast in the future mean you the price can be double or triple in the future.
agree with you, because bitcoin it simple, easy and safe for its users that the first thing that should be explained, bitcopin it different from other virtual money though same function but there are many differences.
love of reference video on youtube he'll quickly understand what is bitcoin, then we give the practice the use of bitcoin