High-yield savings account
Money market account
Short-term Treasury bills
Certificates of deposit
Cash management account
Dividend-paying stocks
Index funds
Bond funds
REITs
Peer-to-peer lending
Covered call strategies
Options trading
Forex trading
Cryptocurrency trading
Margin investing
Arbitrage opportunities
Cashback and rewards stacking
Bank bonus offers
Credit card sign-up bonuses
Reselling items
Flipping domain names
Flipping sneakers
Flipping electronics
Buying and selling collectibles
Short-term rental income
Affiliate marketing
Digital product sales
Online tutoring
Freelance services
Consulting
High-interest debt payoff
Emergency fund optimization
Automated investing
Business cash reserves
Invoice factoring
Merchant cash advances
Private lending
Real estate wholesaling
House hacking
Storage unit investing
Car sharing
Equipment leasing
Buy-and-hold assets
Tax-advantaged accounts
Compound interest reinvestment