Is this the highest single bounty ever payed? The only other paymnts in this range I can think of are the yearly rewards by Google. But then again thats not really a bounty.
https://hackerone.com/hacktivity/overview?queryString=disclo...
The next highest bounty is $200k from Shopify and then again Coinbase with $115k
You can't know that, not all bounty amounts are disclosed, and there's also private/confidential programs.
https://forum.grin.mw/t/ann-bug-bounty-awarded-to-david-burk...
So, no this is a good bounty but still on the small size for a huge crypto project / company.
So, no.
Crypto organizations float closer to the same market value of exploits that you see blackhat organizations like NSOGroup pay. Its just FAANGs that refuse to value them correctly and put up barriers of entry for pennies.