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Alan Greenspan

How to decide if bitcoin is safe for you to trade

How to decide if bitcoin is safe for you to trade

Is Bitcoin a great investment opportunity or a risky bubble waiting to burst like 1637's Dutch tulip mania?

Bitcoin's run-up has grown famous. Late Thursday morning, the digital currency was trading for more than $19,000 on exchanges in South Korea, before closing around $16,600 on Bitfinex, a large cryptocurrency exchange. The $19,000-ish price was up more than $5,000 in less than 24 hours. It was up from $12,000 at the start of the week. And it was up from a little more than $1,000 on Jan. 1.

Not to belabor the point, but in 2016 alone the currency gained more than 100%.

Still, in Friday morning trading

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