Mines can absolutely become suddenly unprofitable. You don't know how much good stuff is in the ground until you dig it up.
The mine went bankrupt in '89, just a few years after Errol bought shares in it. The boss was someone else.
If someone wants karma they could host a modified instance where every post gets thousands of upvotes for free. Other instances can't really verify whether that's accurate.
Lemmygrad is blocked from federating with most other instances but still is a pretty large instance. Though that instance in particular is not very likely to look towards IPO.
It could happen if there was a very popular instance that didn't federate with others.
German "Catastrophe" is "Katastrophe". "Katzastrophe" is "Katze"+"Katastrophe", which in english would be "cat" + "catastrophe"... oh.
Somehow I don't think Errol Musk knew that much about the geology. Allegedly he bought the shares on a whim without first visiting the mine, which was in a different country.