Savings account interest
Fixed deposits
Bonds
Dividend stocks
Index funds
Mutual funds
Real estate rental income
REITs
Peer-to-peer lending
Treasury bills
Certificates of deposit
High-yield savings accounts
Money market funds
Annuities
Business investments
Franchise ownership
Crowdfunding investments
Commodity investments
Foreign exchange trading
Options trading
Futures trading
Arbitrage
Compounding reinvestment
Staking rewards
Crypto lending
Royalties
Licensing fees
Automated online businesses
Dropshipping
Affiliate marketing
Digital product sales