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Should you buy a little digital gold for your portfolio?
It’s tempting. At a market value of almost $2 trillion, including $775 billion in Bitcoin, cryptocurrencies are now bigger than the U.S. junk-bond market. Fortunes have been made as prices soared in the past year. Why not add a little crypto for diversification, and a chance to profit off technology that could revolutionize everything from stock trading to digital art?