Generally every token is always offered at an initial price set by the ICO developer. Regarding the increase or decrease in prices inevitably follow applicable economic laws, increased demand and less on supply will surely raise  q prices. Applies vice versa if token stock offers a lot but low query automatically prices will drop by itself. Token value will also increase if it can be traded on a major  reliable exchange because it is as good as many people who will definitely use it for trading or other purposes (Tradable).