India, July 27 -- W hat does it really mean that most currency is no longer backed by gold? That isn't even really the question. The real question is: How much of our money is "real"? And the answer is: It is impossible to say. For instance, let's say that you put Rs 1 lakh in the bank. The bank uses it to issue a loan to a customer. That money is now in two places at once. The customer who took the loan uses it to buy things; the person he pays uses it again. The money is now in multiple places at once. And that's not even accounting for how much of the original Rs 1 lakh was "yours" to begin with. Anti-capitalists view this system as absurd, and it was partly as a mark of protest against this absurdity that Bitcoin was born. It was market...