It's fucking useless.
Sure i don't understand the cryptography behind it, but i find the general workings very easy to grasp.
When people start asking "what gives it value" is when i fail to explain properly. Even still. All i get is.
"pyramid scheme", "scam", and someone even went as far as to say "what are they doing with all that hashing power, it could be treason" - that was from someone who is mining with duel 6950s. And that was even after i wrote out a really long paragraph of what all that hashing is for. Without the cryptography jargon because i don't know the technical aspects of it.
I may be bad at explaining things, but i quit. I will never try to explain bitcoin ever again. Sorry i've failed the community.