Bitshares was the first decentralized exchange platform. During its existence, the BTS’ value was fluctuated. Don’t forget that the Bitshares’ assets have approximatively the real value of fiat currencies. For example, you can exchange the BTS into BitUSD as well as BitUSD into USD. BitShares Exchange has free & open registrations. BitShares Exchange has also desktop App available. You can use Bitshares’ tokens to buy even smaller items that costs nothing.