A massive quality of life change coming in Patch 10.2 is that Crests are now a currency instead of taking up space in your bags! In addition, we’ve confirmed that players will continue to get 12 crests from timing Mythic+ keystones.
Crests Now Currency
In Patch 10.2, you’ll have 8 bag slots back! Crests are now a currency in your currency tab and fragments also no longer exist, reducing the number of total currencies to 4.