Guild Wars 2

hello im a guy that crafts his ascended armor and weapons but i still have many stacks of empyrial fragments and bloodstone dust shall i keep all of them or shall i throw some away ?
will they have any other use in the future ?

Yes. Apart from Backpieces, which need vision crystals, you can craft nourishments and endless tonics with bloodstone dust. Both will likely be used in jeweling 500 as well.

If you can, just store them on a character you won’t be playing for a while. If you delete them, you might regret it. :-)