Cryptocurrency A bitcoin representation is seen in an illustration picture taken at La Maison du Bitcoin in Paris, France, June 23, 2017. REUTERS/Benoit Tessier/File Photo Register now for FREE unlimited access to Reuters.com June 29 (Reuters) – The U.S. securities regulator on Wednesday rejected a proposal to list a spot bitcoin exchange-traded fund (ETF) by Grayscale, one of the world’s biggest digital asset managers, on the NYSE Arca exchange. Grayscale responded with a legal challenge to the decision, the latest in a series of rejections of proposals for U.S. listings of spot bitcoin ETFs over the past year. The proposal […]