Nearly $10 billion has poured into U.S. exchange-traded funds investing directly in bitcoin since Donald Trump became president-elect, as his embrace of the crypto sector heralds a boom in the market.

A dozen funds from issuers including BlackRock Inc. and Fidelity Investments, attracted about $9.9 billion in net inflows in the period since Election Day on Nov. 5, helping to lift the group's total assets to about $113 billion, according to data compiled by Bloomberg.