Bitcoin has hit a new record of more than $3,300. Just another day at the office for a crypto-currency that's risen 50 percent in one month, 200 percent in six months and 30,000 percent in five years.But the surge tells us more about the speculative games being played by Bitcoin traders than its future as a credible method of exchange. With the currency's rules going through some potentially big changes, volatility and complexity are increasing. Bitcoin might be more valuable but it's not getting any less risky.The latest price jump has the hallmarks of a kind of relief rally, as traders bet it can ride out those ... (full story)