Stop leaving Baleful Fragments on the floor in Diablo 4, the Alchemist turns them into Forgotten Souls
The 100 to 10 rate looks a lot until you see what it feeds in the endgame.
Your extra 
Baleful Fragment do not have to stay on the floor. If you had forgotten, the Alchemist exchanges Baleful Fragments for 
Forgotten Soul so every fragment that drops can still be useful.
The reminder came from a post on r/diablo4 this week, where a player with a maxed out Baleful Fragments asked what to do with the ones that kept dropping. We often reach this spot closer to the end of a season, after long farming sessions. We are sure most of you simply walk past the materials.
How the Exchange Works
You can transmute your Baleful Fragment into Forgotten Soul at the Alchemist. There is no special unlock for this transmutation. It should be available to you directly at the vendor in any town.
Always convert the overflow to other mats that you may need. Of course, keep a decent amount in reserve in case you need it to craft something. You can do that with extra Baleful Fragment, Forgotten Soul, or 
Rawhide and 
Iron Chunk.
Forgotten Soul are very important to your endgame as you will need it to temper a Greater Affix on your gear (which you can reroll as much as you want by using 
Scroll of Restoration until you get the precious affix as a GA), and also for Masterworking your ancestral gear. This is probably one of the most important materials in endgame, and there can never be enough.
So even though the transmutation is a 100-to-10 ratio, it is still worth doing, especially if you were going to leave these Baleful Fragments on the floor.