No, no. Don't misunderstand

Those are just of the bounties claimed so far!
Claiming a PS Coin bounty is not easy, which I think is one reason why it has become so popular among security researchers. Having said that, there are no limits to how much you can be rewarded for a bounty. It is based on the creativity and/or severity of the vulnerability found.
If you think you have the skills to do better than all of those before you, then I would absolutely encourage you to give it a shot! How confident are you?