Price changes are not mentioned in the Official guidelines of FIFA World Cup 2022 Fantasy.
So we can assume, there are no price changes in World Cup Fantasy game and that players prices will remain the same during the whole tournament.
How no price changes impact your World Cup Fantasy strategy?
With no price changes, you do not need to make early transfers to your team. You can wait until the deadline to make your moves, wait until you have all information about potential injuries and news without the fear that player’s prices change and lock you out of your planned moves.