we had a talk yesterday by our H1 people to the company and a Q was asked how our bounty values with in with the industry norm. Part of the answer (IIRC, and it was to help understand how different sectors place bounties at different amounts) included that for some crypto things, bounties have gone up to $1mil (but I could be misremembering, it was at the end of a day of lots of talks and I was exhausted).

A $250K bounty was paid for uncovering a bug in Grin:

https://forum.grin.mw/t/ann-bug-bounty-awarded-to-david-burk...

> At least on Hackerone this seems to be by far the highest Bounty

You can't know that, not all bounty amounts are disclosed, and there's also private/confidential programs.