Bring us your tired, your poor, your huddled cryptocurrencies built on artificial hashing algorithms and stochastic probability measures. Bring us your illicit profits from online drug and kidney trades, international money laundering, and late-night poker sessions conducted in furtive retreat from the prying eyes of Internet censors. And long live this entire peer-to-peer thing: we think China could use a lot more of it.Learning Chinese? Our Chinese podcast for today is an elementary lesson intended for anyone with an interest in digital currencies, or an abiding dislike for particular family members. That said, the content in our podcast is (mostly) true. If you're a bitcoin fan we're happy to share news that you can now use the currency to upgrade your account on Popup Chinese. Send us an email and we'll arrange for your upgrade at the prevailing market rates.