Liquidity and power to buy anything.Liquid funds, Saving A/C, Online wallets, Hard cash
Equity
Ownership into a businessStocks, ETF's , Mutual fund, etc.
Fixed Income
Lending money to someoneFixed & recurring deposits, Debentures, Bonds, etc.
Real Estate
Ownership of a physical spacePlots, Flats, Bunglow etc.
Commodities
Ownership of a good which has an end useGold, Silver, Crude oil, Wheat, etc.
Which Assets should you hold?
The answer lies in Asset Allocation. It involves dividing your investments among different assets depending on how long you have to invest and your ability to tolerate risk.