What is the difference between Libra and other cryptocurrencies?

Unlike many cryptocurrencies whose values fluctuate based on speculation, Libra is backed by a reserve of assets. This is similar to how other currencies have been introduced in the past — to help instill trust in a new currency and gain widespread adoption, it was guaranteed that a country’s notes could be traded in for real assets, like gold. Instead of backing Libra with gold, it will be backed by a collection of established financial assets.