Yes, you can stake IOTA to earn passive income. Here are the steps to stake IOTA with the Firefly wallet:1. Download and install the Firefly wallet from the IOTA Foundation website.2. Move your IOTA tokens from exchanges to the Firefly wallet during the 7-day pre-staking period.3. Mark your IOTA tokens for staking in the Firefly wallet. 4. Staking takes the form of liquid staking, meaning you can de-stake or transfer your tokens at any time with no lock-up period.5. Staking levels and rewards depend on the specific network (Shimmer or Assembly) and their payout ratios and schedules, which can be calculated using the rewards calculator on the Shimmer and Assembly websites.6. Once the respective networks (Shimmer and Assembly) launch, the rewarded tokens will be transferable.7. To stake, click the Stake button. Please note that the app does not need to be open to receive the airdrops once you have started staking.