Authorities in different countries are issuying warnings or holding emergency meetings to discuss the trading of cryptocurrencies, since these have been highly volatile lately and many fear a bubble burst. South Koreas government has, for example, called an emergency meeting to discuss the trading of cryptocurrencies, and measures on the market will be announced on Friday. Meanwhile, the head of the US regulator (SEC) warns extreme caution over cryptocurrency investments. The cryptocurrencies market cap got actually higher than the JP Morgan one, over 370 billion $. Besides worrying, maybe its high time to improve the legislation?