My english isn't perfect but i just had an idea
If bitcoin would have a integrated eye-scanner, with that you can encrypt your wallet + integrate it in the blockchain (if that works? no idea), then it would be - much higher security against hacker, and the best reason - you could pay just with your eyes!
You went to a cigarett automat or any other vendor machine (cofee, bus/train/flyticket and so on..), select the product you want, scan your eyes to get connected with your wallet, see your total balance, confirm the payment and you are done!
You don't need some shitty creditcards or other devices anymore, because your eye scan is in the blockchain bound to your account and thats your new wallet.
With that method you could buy everything just with your eyes, thats the future, thats the way.
Well its not exactly the future, girls are already get paid from mens just because they are using her eyes on him
What you think?