Board Thread:Questions and Answers/@comment-27917177-20160305012242/@comment-31757186-20170417084702

I wouldn't recommend you doing this, as crown chests can be earned with ease, but you can't stack up more than 2 of them.You will easily get crown chests in higher arenas.So feel free to open a crown chest as soon as you get it, if you just keep it there you won't get any higher rewards, you will just waste your time, patience and you will temporairly slow down your progress.