The US Securities and Exchange Commission has suddenly put brakes on high-leverage crypto ETFs by issuing warning letters to major ETF issuers. Proposed funds from issuers like Direxion, ProShares, Tidal Financial, Volatility Shares, and GraniteShares apparently exceeded volatility limits – by using derivatives to chase extreme leverage on crypto and single stocks such as Tesla or Nvidia. The applications for ETFs that promised 3x to 5x returns on assets like Bitcoin and Ethereum could be blocked? But wh ...