Like a fingerprint, your heartbeat is unique.
The Nymi tells the world, you are you, allowing you to securely communicate your identity to all of your favourite devices.
Bitcoin has been a simmering interest for a while now. There's regret, of course, that I didn't purchase when I first became aware of it - a few pounds spent then would be worth thousands today - but this is the regret of the speculator in me, or rather the timid non-speculator.
Also interesting is that there are systems being constructed using new forms of identity verification. Whether it's possession of a cryptographic key a la bitcoin, dogecoin or Coinye West (truly we live in exalted times!) or another unique identifier such as fingerprint or DNA, new ways of making ourselves known and guaranteeing our identity or ownership are now cresting the horizon.
So I was an easy mark for the emotive copywriting at http://getnymi.com. "With every beat of your heart, the nymi unlocks a world of possibilities", they say, making it easy for me to spend $75 on a bracelet that apparently will use my unique heart rhythm to tell the world that I am me.
I imagine that once it ships I'll be lucky to be able to unlock my phone with my nymi, let alone a world of possibilities. But a future where I can withdraw library books, travel internationally or pay anywhere using my own heartbeat as a passport - that feels rich and interesting and very exciting. Truly, as nymi write on their site, the heart wants what the heart wants.