Asset manager 21Shares has filed for a spot Dogecoin (DOGE) ETF, indicating growing institutional interest.The regulatory climate in the US has become more favorable towards cryptocurrencies, increasing the likelihood of an ETF approval.If approved, a Dogecoin ETF could have a bullish impact on DOGE price, potentially pushing it towards previous all-time highs.However, investors should remain cautious due to the high volatility and meme-driven nature of Dogecoin.