Didn't Ethereum recently disclose a major settlement vulnerability discovered by a researcher that could've forced a hard fork had this person chosen to exploit it? He got a multi-million dollar bounty for it I believe.
This kind of certain optimism that nothing will go wrong with a piece of software reminds me of all the people back in 2007 that said the housing market could never collapse because it never had before. Folks buy into the idea so much that they forget at the end of the day, it's computers running code and shit happens all the time.
EDIT: I believe this was the story I was referring to, he received $2M[0]. There have been multiple major vulnerabilities discovered in the last couple of years.
[0] https://www.benzinga.com/markets/cryptocurrency/22/02/255731...