South Korea and China aren't the only governments looking at greater regulation of cryptocurrencies.
Though none have mentioned bans of any kind, France, Germany, Britain and the European Union are considering measures or already taking steps.
The European Union is implementing stricter rules to prevent money laundering and terrorism financing on virtual currency platforms. It is also looking into limits on cryptocurrency trading.
UK's Treasury plans to include digital currencies under existing regulation dealing with money laundering and terrorism financing.
France is worried about tax evasion and wants to protect investors from the risks of speculation and manipulation.
Germany's individual concerns aren't as clear, but it is working with France on a joint analysis covering the risks linked to Bitcoin and regulatory proposals. The countries plan to release the analysis at the G20 meeting in March.
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