Most wealth is stored in the form of "assets"—that is, things you can own that you assume can later be sold or redeemed for money. Assets can include real estate, stocks, bonds, bank accounts and even cash stored in your mattress. The problem with assets is that their value is always speculative, and their value today may not be their value tomorrow. Even cash carries a risk, because inflation could reduce its buying power over time. Glenn Campbell explores the value of assets based on his experience with real estate in Las Vegas.