I get that you can exchange it 
But why would someone buy it? Why would one want to buy FLDC?
Speculators on the exchanges buy and hold FLDC, hoping to make money selling it for more than they bought it for. Look at last year's price versus now (but remember it's not guaranteed to increase over time).But why would someone buy it? Why would one want to buy FLDC?
People also support paying for research by buying FoldingCoin, CureCoin, GridCoin, ...