Except scams and bubbles cause negative externalities [1] such as systematic risk [2] so they do impact other people. [1]: https://en.wikipedia.org/wiki/Extern

Except scams and bubbles cause negative externalities [1] such as systematic risk [2] so they do impact other people. [1]: https://en.wikipedia.org/wiki/Externality#Negative https://en.wikipedia.org/wiki/Externality#Negative [2]: https://en.wikipedia.org/wiki/Systemic_risk https://en.wikipedia.org/wiki/Systemic_risk