Ark Investment Management founder and CEO Catherine Wood is a big believer in bitcoin, which has seen a rise of more than 1,300 percent so far this year.
Bitcoin is "so much bigger an idea than even Apple, which is a pretty big idea," Wood said Thursday on CNBC's "Halftime Report."
Wood said her fund can't own the cryptocurrency directly, so it bought shares of Bitcoin Investment Trust (GBTC) in 2015 when bitcoin traded below $250 to get exposure.
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