An investment is defined as committing funds with the expectation of earning a positive return in the future. It involves sacrificing present consumption for future benefits and always carries some degree of risk that the actual return may be lower than expected. The key elements of any investment are expected return, risk, safety, liquidity, and potential tax benefits. Common avenues of investment include bonds, gold, mutual funds, real assets, equities, insurance policies, and financial derivatives. Factors like current events, currency valuations, production costs, and economic/political uncertainty can influence fluctuations in gold prices over time.