Too Upgrade gear , you need silver.  This is a constant factor . 

the problem with upgrading gear is That it isn't guaranteed. But your silver will be guaranteed lost upon making a upgrade attempt. Why is it not as simple as upgrading to the next lvl  like any other game.?  this is like gambling at the grocery store , you go buy a carton of eggs but when Yu get home there's no eggs in the carton. THIS GAME AS A WHOLE IS A LIABILITY AND A RISK. the downfall of this game can't come any faster