I'm not sure if this has ever been implemented yet, but can you imagine a way of paying with Bitcoin by just using your own body?
It would be more of like a microchip implanted into your left or right hand that would contain both your public and private keys to send and receive Bitcoins.
So in case you want to send or receive some BTC, you would just pass your hand over at a scanner and it would perform the desired operation. This is would make it a very convenient and easy way to transact, and carry your Bitcoins with you anytime, anywhere. However, the only thing to be considered would be the security of your private key from within your implant, to protect your funds from theft.
Nevertheless, I want to know your opinion about this, since it would be pretty cool to have such a system to help spread mass adoption of the cryptocurrency.

it would be nice that way, but I think we are looking too far from the future the way we are talking things here, though it is a really good idea because it will be more convenient and less hassle than accessing first our web wallets before we can send transactions. But the problem is, what if somebody would remove the implant in our body, and steal the bitcoin on us, then it will all just go to waste, all the efforts that we spent in order to earn that bitcoin.
I think it would be more better if it is not going to be implant but it is connected online to our web wallet, in order to be safe and more secured.