Data compiled by CoinShares shows that investors put about $2.6 billion into Bitcoin funds in the second quarter, compared to approximately $13 billion in the first three months of this year. Matthew O'Neill, co-director of research at Financial Technology Partners, said that the issuance of ETFs has caused great excitement, but there was a natural adjustment after the rise. These ETFs have attracted a lot of attention from professional investors who want to invest in Bitcoin but only want to buy cryptocurrencies through institutional means. For those who haven't bought ETFs yet, he said they might be waiting for the next time Bitcoin prices rise before entering the market.