I find it not a good idea. It was fun to chase the chrystal boxes, it created nice battles around them and gives a good feeling when you managed to score one. That feeling is lost now putting it in the batle fund. I just hope it is not intended to slow down the chrystal amounts you collect so you feel more pressure to use real money. Anyway, bad idea, bring them back as soon as possible. It is a main aim from the game for me!