My pets. Between elixirs, potions, buying TC spots and the items for the treasure... Well, it gets pretty expensive. Add in the fact that I can't draw or code, and basically I am perpetually broke.
After that it's probably my wardrobe, but I haven't put very much money into it in years. I doubt it's worth more than 500mil. [edit] Oh, whoops, my wardrobe is worth 2.5bil. Maybe I should sell some it...
I spent what little sp I had on my first MC pet slot. Looks like most of my account worth is in my wardrobe (about half) and pet treasure items, books and food.
Some has gone to subq items and buying wardrobe achievements. I am achievement crazy. :p
Not into my goal of getting a , that's for sure. :p A lot of my sPs gets eaten from training 4 pets and battling with my main pet.
Wanna know more about battling? ❤️ The Official Battle Guide v3.3 ❤️ Need to find books? 🌈 The Book Grind Guide v1.0 🌈
Most of my sP went to my Wardrobe. And then collections and my main pet. Also, pretty art in the art market!

Pet Books Read: Wuf: 3,563,970,614 sP.
lol.
sadly that's probably not where most of my sP has gone.
Collections. Without a doubt that has been my biggest money drain.
Serious Telenine Collector at work!
My Pets, there's no doubt. For that I don't even have to count in their weapons and the training - pet slots, treasure chests, potions etc should be enough to create a huge number.
wardrobe and, to a much lesser extent, pet treasures. sobs at the sight of the account worth page
account worth: 3,700,772,935 sP wardrobe: 2,497,251,669 sP
also occasionally i'll liquidate a set amount (usually 100mil) into CSC because i know the prices will rise.
Changing the color of my pets. I have had a pet of each color.
[tot=Liliana]
Wardrobe: 3,465,220,125 sP.
I feel like just about everyone has the same answer
[Tree=deannaestmirifica]
Wow, I didn't realize I had this much stuff already. I haven't been here very long!
Hyla, your account is worth 153,308,426 sP Fragmentizer Shop: Humming Power Crystals: 47,920,689 sP Pure: 41,883,178 sP Wardrobe: 36,428,283 sP
Hm. I tend to buy a lot of cheap stuff I see when I'm pricing my shop; anything priced under 300sP gets nabbed and taken to the fragmentizer. I didn't know those were "worth" so much.