Remember this moment because it probably won’t last: A U.S. lottery jackpot has soared above $1 billion, and that’s still a big deal. After three months without anyone winning the top prize, a ticket worth an estimated $1.22 billion was sold in California for the drawing Friday night. The high number has evoked headlines and likely lured more people to convenience stores with dreams of private spacewalks above the Earth. Jonathan Cohen is the author of the book “For a Dollar and a Dream: State Lotteries in Modern America.” He says he expects jackpots to continue to grow in size. Larger payouts attract more media attention, increase ticket sales and bring in new players.