Supply and demand determines the value, DCR does this with their POS system stake, the POS ticketing price changes but locks up the funds for months.  cutting the supply, when the demand drop for the purchasing of the tickets the price drops and more dcr are purchased of the market until the tickets are sold, then the price of the tickets adjusts.

Ethereum system is locking up funds in it seems in a endless supply of ICO's which only really the ICO holders will ever use..

spells of genesis used trading card digital asset to create demand at the same time the sales would burn their token .