(e)Mail call. - MarketWatch photo illustration/iStockphoto Dear Charlie, I read your latest piece about BlackRock BLK backing gold GC00 and bitcoin BTCUSD, and Jeffrey Gundlach recommending gold. You make me laugh, which is why I follow your columns, but I still have serious issues with this thesis. You keep pushing bitcoin as some kind of salvation, but it crashes 75% regularly. How is that better portfolio management than just owning the S&P 500 SPX? The U.S. stock market has delivered 10% annually an ...