A new social post by controversial trader Keith Gill, known by his social media name Roaring Kitty, has injected fresh volatility into GameStop (CRYPTO: GME) memecoin. What Happened: The trader, who has hogged considerable positive and negative publicity in the last month, shared the opening scene from Christopher Nolan’s “The Dark Knight” through his official X account Sunday evening. As has been the case, the Solana (CRYPTO: SOL)-based memecoin–which pays tribute to the 2021 short squeeze of GameStop Corp. (NYSE:GME) by the legendary trader–soared 14% within minutes of the post, according to…