In the US, California opened the world's biggest legal marijuana market, Vermont legalised possession of the drug - becoming the first state to do so through its legislature-, and Michigan became the 10th state to OK its use.
In numerical terms, the price of Bitcoin rocketed by a staggering 1,900 per cent from $1,000 at the start of 2017 to a peak of just under $20,000 11 months later in mid December.
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