We are introducing a lot of new stuff with the Summer Mega Patch on June 27th so some systems will change to accommodate.
First, with the Summer Mega Patch Silver Chests will be purchasable for 400 Battle Coins. Leveling your account will also award Silver Chests. Gold Chests will however no longer be obtainable via Battle Coins. Instead players will get them via Gems, Quests and leveling Champions.
Second there’s also changes coming to how players earn Battle Coins. Players will no longer earn 50 Battle Coins by winning 3 matches. Instead they will earn Battle Coins after every match regardless of if it’s a win or a loss. This income uses a static value where a few factors also grant extra Coins. Despite this the Battle Coin income rate through matches stays about the same. The total Battle Coin income will be higher than before though due to the new Quest system.
If you have extra Battle Coins lying around, make sure to buy Gold Chests with them while you still can!