On July 6, the SEC will say whether it has approved Grayscale's application to turn its flagship Bitcoin Trust into a spot ETF.Crypto asset manager Grayscale–which stewards $43 billion in cryptocurrencies–has reportedly launched a marketing campaign asking people "to advocate for a Bitcoin ETF" to the United States Securities and Exchange Commission (SEC). According to initial reporting from Axios, a Grayscale advert appeared in Washington D.C.'s Union Station, saying "we care about...