VistaShares BitBonds 5 Yr Enhanced Weekly Option Income ETF (BTYB) offers income by combining U.S. Treasuries and a Bitcoin options overlay. BTYB targets double the yield of 5-year Treasuries, distributing income weekly, but faces NAV risk if Bitcoin declines or distributions require return of capital. The fund's synthetic covered call and covered call spread strategies on Bitcoin expose investors to downside during rapid sell-offs, especially with monthly rebalancing.