Bitcoin, with a history of vertiginous ascents and steep drops, is close to taking out its record peak of near $20,000, having climbed almost 160% this year. Its gains in November alone are more than 30%.
Here's the story of bitcoin's 2020 rise in four charts:
Graphic: Bitcoin's 2020 rally -
As central banks and governments unleashed the money-printing presses and spending taps to combat the damage from the COVID-19 pandemic, plentiful liquidity has lifted assets from emerging currencies and junk bonds to bitcoin and stocks.
Assets under management (AUM) at Grayscale, the world's largest digital currency manager, have soared to a record $10.4 billion, up more than 75% from September. Its bitcoin fund is up 85%.
Smaller rival CoinShares says its AUM has climbed more than 150% this year to $1.3 billion.
More broadly, high savings rates have sent money flooding into investment funds, potentially sparking interest in bitcoin as a portfolio diversifier.
JPMorgan analyst Nikolaos Panigirtzoglou says there are signs of family offices, which manage money for wealthy people, allocating towards the cryptocurrency.
Graphic: Bitcoin vs. stocks -
With governments and central banks in full stimulus mode, some observers reckon bitcoin is a useful safeguard against inflation - with supply capped at 21 million, its scarcity gives it an innate value.
Some who buy gold to hedge inflation risk may be turning to crypto, JPM's Panigirtozoglou said, adding: "There is a reassessment of bitcoin about its value here as an alternative currency, as an alternative to gold."
But bitcoin's rise outstrips gold's gains of 20% or so, while an inflation-linked government bonds index is up 4%.
And its rally has sped up in recent weeks even as gold has flatlined, and the resurgent pandemic makes a growth and inflation recovery a distant prospect.
Graphic: Bitcoin vs. inflation hedge assets -
Part of the gains may be due to growing acceptance of bitcoin as a payments system and by a broader range of investors.
Bitcoin has jumped by half since PayPal said last month it would open its network to cryptocurrencies, meaning users could spend bitcoin at its 26 million merchants.. That fanned hopes it could catch on as a way to pay.
Traders who say there is more participation by bigger investors point to lower levels of volatility than during the 2017 bubble. Ten-day price swings against the dollar between end-June and mid-November - a period when bitcoin prices nearly doubled - were well under historical averages.
"It's still largely retail, but it's becoming more efficient, mature, and I see more professional participants," said Andrea Leccese of crypto fund Bluesky Capital.
Graphic: Bitcoin: a volatile history -
(Reporting by Tom Wilson and Ritvik Carvalho; Editing by Paul Simao)
By Tom Wilson and Ritvik Carvalho