Most people or most people with money? Ultimately it's the people making investment decisions you need to convince in order to get the money from them. Then the reality check is whether you can give them that money back and more. Those investors should in theory be self-interested in making sure that this is actually useful, because if they don't they'll lose their money, but in practice they are not superhuman and prone to fads and echo-chambers (especially because it's a relatively smaller group that can move a lot of money around, and short-term investing rewards running with the crowd to some degree), but there's not a single group of people that would not fall victim to poor decisions in this regard (whether you're imagining a centrally managed economy, the electorate, or some hypothetical benevolent dictator).