Personally, I think that you shouldn't spend your emotions on something like that, because Bitcoin is a cryptocurrency, and everyone has the right to choose how and with what they want to do their transactions or what they will invest in. I'm not saying that you shouldn't challenge the baseless lies that people tell about BTC, but any discussion about what someone will do with their money is completely unnecessary - after all, why would someone give financial advice if they are not a financial advisor?