CryptoCompare, a global cryptocurrency market data provider, recently released an exchange evaluation report for the second quarter of 2019. The report shows that among institutional trading products (derivatives), the Chicago Mercantile Exchange (CME), the pioneer of bitcoin futures products, continues to dominate the bitcoin futures market, with a trading volume of $11.3 billion in May. However, the volume of transactions in June fell by 30%, and the transaction volume reached 7.9 billion. The report pointed out that the vast majority of transactions occurred in currency transactions, nearly 84% ($ 493 billion). In the three months, this proportion remained unchanged, with the highest activity in May and a slight decline in June. The US dollar (USD) is the largest legal currency in Bitcoin (BTC) transactions, accounting for approximately 60% of the total trading volume. The BTC's trading volume against the US dollar fell slightly by 4.3% from May to June, from 2.13 million bitcoins to 2.04 million bitcoins.