Sexy?
How about useful first? That's sexy, at least to me.
This issue has me perplexed. With all the bright minds on this board, and of those attached to Bitcoin elsewhere, why hasn't this issue been solved? It's like building the best rocket in the world to explore the universe, but nobody knows how to get it off the ground, let alone into space.
Ok, how about we start by defining the word 'useful'? What is it that we need bitcoin to do that it currently can't do?