Swiss digital asset manager 21Shares has filed with the US Securities and Exchange Commission (SEC) for approval to launch a spot Dogecoin ETF.The proposed ETF would track the performance of Dogecoin and would use Coinbase Custody as the proposed custodian.Other companies, including Bitwise and Grayscale, have also attempted to launch spot Dogecoin ETFs.Polymarket gives a 64% chance of the SEC approving a Dogecoin ETF, in line with the prediction of Bloomberg analysts.