As the banks learned, making massive financial bets with money you don't have, buying and selling complex investments that you don't fully understand and making loans to people who can't afford to repay them are bad ideas.
On the other hand, leverage isn't all bad if it's used to maximize returns, while avoiding potentially catastrophic losses. This is where
options come into the picture. If used wisely as a hedging strategy and not as speculation, options can provide protection.