According to CoinDesk, the 2x Long MSTR Daily Target ETF (ticker: MSTU), which targets double the daily return of MicroStrategy (MSTR), saw inflows of over $72 million in the first seven days since its launch. This comes as "bitcoin crossed $66,000 for the first time since July 31, while shares of MicroStrategy traded at $778, up $10 from that date," the publication reports. The higher returns available from betting on bitcoin than investing in it directly are likely behind the inflows.