With the recent HN headline that the bond market could follow suit with the equities market [1] I do wonder about what seems like a growing shift to what I'll s

With the recent HN headline that the bond market could follow suit with the equities market [1] I do wonder about what seems like a growing shift to what I'll summarize as "The Bogleheads" approach of simple, diversified, low-fee ETFs. Could we be setting ourselves up for a situation where things will crash much harder than they would if people weren't using these robo-advisors because Main St. investors will be more "homogenized" in their investment choices? Not the most educated on these matters, so please feel free to tell me where I'm totally off-base with this. [1] https://news.ycombinator.com/item?id=10252166 https://news.ycombinator.com/item?id=10252166