Goldman Sachs has developed its own cryptocurrency for a settlement system for trading stocks, bonds and other assets, according to a recently published patent filing. The New York-based financial giant made a patent application last year for a new virtual currency called SETLCoin, which makes it easier and faster to trade securities and settle those trades. (The patent application was published only recently, a typical lag between patent applications and when they are made public by the US Patent and Trademark Office.) While the trading desks at the world’s top financial institutions often rely on lightning fast technology to execute …