Could you elaborate on what a Bitcoin ETF is and highlight some of its key benefits? In recent years, we've seen a surge in interest in Bitcoin and other cryptocurrencies, and ETFs have become a popular way for investors to gain exposure to these digital assets. However, I'm still unclear on how a Bitcoin ETF specifically works and what advantages it offers compared to other investment options. Could you provide a concise yet informative description of a Bitcoin ETF and its pros?