Any successful merchant who never holds cryptocurrency in the lives of those who come and makes some negative comments about it should not be heard. It's like they are giving reviews to items they do not like because they have one they use and they get paid to use it. These comments are irrelevant no matter how successful someone is to invest in Bitcoin if they do not fully understand the concept and dynamics of cryptocurrency. Of course this is a new technology and its volatility raises a red flag, but the fact that people invest so much into it and build services around it already justify that people want it to remain. Thanks