Because it erodes their privilege. The "great investors" aren't any smarter, they just have institutional access to investment vehicles that the rest of the world is "classed out" of either by minimum investment requirements in the millions, by private access outside the public market, or by "risk assessments" that make it a requirement to be a certified "expert" to take part. This is how they make their money, not by being smart, but by being on top of the pyramid. Bitcoin is something everyone can access. Dirty prole investment. Bah.