The magnitude of Bitcoin's boom suggests investors have reason to be worried
The cryptocurrency touched a peak of almost $20,000 in December
Hedge funds offer investors more than just a wager on rising cryptocurrency prices
When bitcoin skyrocketed in 2017, the electricity demand associated with it climbed to 20.5 terawatt-hours a year
The 'Others' category on CoinMarketCap is now 22 per cent of the market, just about 10 percentage points from Bitcoin
Rival cryptocurrencies Ripple sank as much as 40 per cent and Ethereum dropped 26 per cent