Thank you Darren4Turbo & mserbia :D

I just used 9 650 crystals for m1 viking upgrade but i still don't know the reason when i logged in i had less crystals. I would like an explanation please.

Yesterday i had 18k crystals and then today evening i logged in i had 16k crystals. i just earned 1k but I'm still not happy with the missing crystals. You might ask me how I'm sure that i had 18k? Because i was about to upgrade viking m1 and i was 1k short. That's how I remember. No one knows the password. I even have an email linked. I didn't spend any of the crystals because i wanted m1 in 50% off (Tanker's Day Sale) I would like to know the reason please. Thank you.