[agent008t]

Another problem with concentrating in the industry in which one works (and even worse - the company for which one works), is that in the event of a downturn, both your job/career and your investments will be hit at the same time. Just when you need your investments the most, they will be worth less than you expected.

[sloaken]

That is what happened with Enron. Company went under, peoples 401K were in the company stock, company matching was in the company stock. After that I noticed companies would either not let you put your donation to the 401K be in company stock, but sometimes the matching would be.

[muzani]

Dot Com is one of the biggest examples. Tech is everywhere now and it's less likely but I can definitely see this for crypto because everything is anchored on Bitcoin (and Tether).