Elon Musk isn’t the only one who wishes he had a crystal ball to see what the future holds. Many prominent executives admitted on second-quarter earnings calls that the direction of the U.S. economy is difficult to judge, although many executives are optimistic that the United States will avoid a severe recession this year, or even next year. 　　Musk said on Tesla’s (TSLA) earnings call: “Sometimes it feels like the world economy is going to collapse, but then the next day, everything seems to be fine again, and frankly, I don’t I don’t know what’s going on right now.” 　　Many investors can relate to what Musk said, and so do…