blossom bag is actually arguably worse than even a regular brown backpack to use as a main backpack (the one youre actually wearing in equipement window, the one you can imbue) because blossom bag has no imbuement slot... so if youre caring about weight,cap etc youre losing 3,5 or 8% cap from not having the imbuement on blossom bag... making the ghost backpack by far the best, and even holding is better than blossom...
but if youre rich and trying to save cap and all, i guess using blossom bags everywhere exept your "main" one is the way to go! (i dont think youll be able to buy like 5-10+ ghost backpacks lmfao but getting 5-10blosom bags shouldnt be too hard, just kinda expensive , on my server i think theyre somewhere between 100 and 200k