Altcoin-based ETFs are gaining popularity in the cryptocurrency market.Ripple CEO, Brad Garlinghouse, optimistic about rising institutional demand for XRP with the approval of Bitcoin and Ethereum ETFs.Bitwise Asset Management files for a Bitwise XRP Exchange Traded Product (ETP), signaling further adoption of XRP into traditional finance.Potential long-term bullish rally for XRP expected from institutional adoption and integration into the crypto market.