Which ETFs are involved in the cryptocurrency ecosystem?

In the dynamic world of finance and cryptocurrency, one of the most intriguing questions is: which Exchange-Traded Funds (ETFs) are actively participating in the ever-expanding cryptocurrency ecosystem? As the industry matures, more traditional financial institutions are looking to capitalize on the opportunities presented by digital currencies. ETFs, in particular, have the potential to provide investors with diversified exposure to the crypto market without the need for direct ownership of individual coins. Understanding which ETFs are involved is crucial for those looking to navigate this emerging landscape. Could you elaborate on some of the key ETFs that are currently active in the cryptocurrency space?