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.
Exactly, bitcoin investors and hodlers will almost always get the last laugh anyways, they can scream all they want that bitcoin is made out of thin air and that it's a useless thing that we put value into but they're all hypocrites that still considers fiat and gold as variable when both of them are just the same as bitcoin, their valuation was based on how much someone thinks it's worth and the demand it have on the market. I really like to listen to this kinds of people though, talking brashly and arrogantly about the things that they don't know about thinking that they're suddenly an economist or a trader just because they've watched a 20 minute video about economics online. Bitcoin haters will continue to hate even if the price goes up to a million in the future, so let them be, they will never have their minds changed or anything like that, they will never be able to move on or learn something new.