The U.S. Securities and Exchange Commission (SEC) has delayed a decision on whether to approve applications for spot bitcoin exchange-traded funds (ETF) from Invesco, WisdomTree and Valkyrie, a filing by the regulator showed on Thursday. The SEC has pushed back the decision dates for the three proposals by several weeks to mid-October, but could potentially delay further. The delay comes just two days after a federal appeals court ruled on Tuesday that the SEC was wrong to reject an application