According to data compiled by CoinShares, investors put about $2.60 billion into bitcoin funds in the second quarter, compared with about $13 billion in the first three months of the year. Matthew O'Neill, co-head of research at Financial Technology Partners, said there was a lot of excitement around ETF launches, but after the rally, there was a natural correction in prices. These ETFs have attracted the attention of a large number of professional investors who want to invest in bitcoin but only want to buy cryptocurrencies through institutional means. For investors who have not yet purchased ETFs, he said they may be waiting to enter the market when the price of bitcoin next rises.