Crypto-focused investment firm Grayscale officially unveiled  exchange-traded funds for leading memecoin Dogecoin (DOGE) and Ripple-linked asset, XRP, on Monday.  Both ETFs, which are conversions from previous funds, began trading on NYSE Arca under tickers GDOG and GXRP, respectively.  “With GDOG’s uplisting on NYSE Arca, we’re expanding investor exposure to a network that’s fast, low-cost, and leveraged by thousands of users every day,” said Grayscale Senior Vice President of ETF Capital Markets Krista Ly ...