For the fact that we are in the 21st century and we are more technologically advances is even a good reason not to think that Bitcoin's being not in a fiat form makes it a scam.we have evidences of Bitcoin's reality and genuinty, and if anyone sees it as a scam, you need not stress yourself arguing, it's not bad trying to convince though, but by your spending, they will believe. many believe it will soon crash. It's simply because they have no understanding of it.