For megafans of megastars like Madonna and Mariah Carey, obsessive collecting is an emotional, not a financial, investment.

Some bands leave behind songs. The Beatles left behind objects that still matter decades later. Guitars, drums, handwritten ...

Maybe you won your office pool. Maybe a bank erred in your favor. Maybe you got a refund on your tax return. What are you going to do with that money? You could put it all in your savings account. Or, ...

Pokémon Trading Card Game (TCG) market. Between Mega Evolution hype, Prismatic Evolutions, and special illustration rares ...