Octopus has 3 hearts, is it a research subject? Can it be applied to humans?

But do people really need three hearts..? I feel like this is the optimal body condition right now..

If you have 3 hearts, wouldn't the chance of survival be higher even if one stops?

If you had three hearts, your body would become bulky like a bodybuilder's, and your stamina might improve compared to now. You wouldn't get tired easily... lol