Justin Sullivan/Getty Images News Robinhood Markets (HOOD) is developing new features that would let the app's users invest spare change and to help protect against wild swings in cryptocurrency, Bloomberg reports, citing code in test version of the company's iPhone app. An option named "round up investments" would allow customers to invest their spare change in specific stocks. The code was in a version of the app distributed to beta testers earlier this month, Bloomberg said. Also included was a potential rewards program that would award bonuses to those using the round-up option. Another potential feature, meant to protect against crypto market volatility, would trigger a message: "To protect your orders against volatility, we may sometimes skip your recurring orders or buy less than your chosen amount." The code says the app will notify the user when that happens and won't buy more than a user's specified amount. The potential