Alright, so today I just so happened to check my account screen (due to my brother having his account hacked - I wanted to check if i'm safe), and lo and behold, I have somehow gained 2000-ish TC.

I checked my account history, but it was empty. As though nothing has happened for a long time.

Should I be concerned? Or do I just have a bad memory?

Maybe you had 2000ish TC left over and forgot?

Like I haven't checked how much TC I have in over a year and have forgotten by now

Acquisition of the tc must have occurred some time ago, it's not in your account history. Time for a buying spree, congrats.

maybe someone buys your items in the market??