I really would not spend all your SCs at this time. The anniversary is around the corner (next month I believe), so most players are saving up just for that. Assuming you had about 25 SCs, then you can start saving up from this point on. There's still a couple more farm revivals before repeats, so you can net those SCs back in no time. That and there's still normal events going on. The anniversary will probably give you free daily SCs too. The most daily SCs I've gotten was 3 SCs for 7 days, making 21 total free SCs. Though this was only from the million player milestone. From what I heard from others on different forums, the minimum that you should save up before the anniversary is around 40 SCs.