Let them think what they want to; if they think Bitcoin is a scam, it doesn't make any difference for Bitcoin. Bitcoin has already proven what's in it; those who want to call it a it a Bitcoin scam don't really know how a decentralised currency works. Bitcoin wasn't created to make us rich; it was a p2p decentralised cryptocurrency to make a solution for a borderless payment system without a third party. How would Bitcoin be scammed when it wasn't controlled by anyone? Due to a lack of proper knowledge, a few people think Bitcoin is a is a scam. We aren't concerned about it.
Am really happy for this comment, you did reply so well. Anyone that thinks Bitcoin is a scam should start being a slave to fiat like the OP already stated, Bitcoin is not a scam but people doesn't understand what Bitcoin is and that is the main reasons why they think that Bitcoin is a scam. If Bitcoin is a scam it wouldn't have been were it is today. The man that invented Bitcoin just made it very different from fiat banking systems. Bitcoin is decentralized and that's the main reason why it can't be controlled by any body, so when they are saying Bitcoin is a scam I don't blame them because they don't understand all this things we are saying here. They thinks that Bitcoin is a scam because some people give scammers a chance to scam them their Bitcoin, I have also seen were a scammer scammed someone and collected his fait currency, which means fiat is also a scam 