Often I'm asked to explain BTC to someone and occasionally I come up with something stellar that really nails it, but most times it's a rambling incoherent mess.
What I would like to see is a short and simple explanation of what BTC is that is suitable for someone non-technical to understand.
Maybe if i were you, i would explain like this:
Bitcoin is a kind of digital currency that has the same currency value that can be traded like usd, poundstering, etc,
the difference is because of bitcoin is digital currency so there is no physical form like physical currency.