Interest in cryptocurrencies is on the rise.While no formal estimates of cryptocurrency holders exist in India, the top three exchanges claim they each have users in the range of 1 to 10 million.Who are these users? Investors? Believers in cryptocurrencies? Could they also be those who want to launder money? Or finance illegal activities?For a while now, regulators, seeking a clampdown on or regulation of cryptocurrencies, have argue...