The U.S. Securities and Exchange Commission (SEC) has acknowledged the filing for the 21Shares Spot Polkadot ETF, a significant milestone in the approval process for the exchange-traded fund linked to the Polkadot cryptocurrency, denoted by the ticker $DOT. This development was confirmed by multiple sources, including Cointelegraph and CryptoWendyO. The SEC's acceptance marks a key step as the agency reviews the application, with a decision pending on whether to grant full approval for the ETF. The acknowledgment of the filing is seen as a positive indicator for the growing interest in cryptocurrency-based investment products.