Bitcoin's price has more than doubled in 75 days, leading some observers to wonder if the market is nearing over-extension. CaseBitcoin suggests it may accelerate even further. On January 7th, BTC soared from $21,000 to $42,000 in just 22 days, setting a new record for the fastest doubling time in the current trading cycle. Within a week in 2013, Bitcoin's doubling time had shrunk to only four days.