Investors have plowed money into funds tracking bitcoin, betting on a return of Republican Donald Trump to the White House even as they expect wild price swings in the world's largest cryptocurrency during the election week, data showed. Exchange-traded funds (ETF) tracking the spot price of bitcoin notched net inflows of $917.2 million on Wednesday, the biggest one-day increase since March, according to the Block, a data and news provider. BlackRock's iShares Bitcoin Trust ETF, the largest spot bitcoin fund by assets under management, pulled in $872 million in net flows, the largest one-day haul since its launch in January.