Bitcoin crosses $30K to reach an all-time high, after growing almost 50% in December (Alice Gledhill/Bloomberg)

Bitcoin crosses $30K to reach an all-time high, after growing almost 50% in December  —  Bitcoin, the world’s largest cryptocurrency, topped $30,000 for the first time, just weeks after passing another major milestone.  —  The currency gained almost 6% on Saturday to reach nearly $31,000 …