I don't know how and why you consider it as a boring investment if everyone will own bitcoin.
Same question here, I don't see any relevance if everyone will own bitcoin.
Also, how can this become a threat to the market value? Just because the price of bitcoin is so slow to increase doesn't mean that the main cause is it becomes a common investment,.
No logic at all, value still depends from demands and supplies, once there are usages that be added
and introduced, value will pumped high.
There are so many reason but this is mainly not because of the reason you have said.
Everyone have it's own opinion and it will depends from how deep they understand and believe
this investment currency.