[Reyoki]

Do I need to tease you about that, sis?

Yes, achievements are a noble endeavor. Just don't go spending all your Anka Tokens at once. Once you get your achievements, that's it. You won't be able to re-earn any just because you run out of Anka Tokens. Granted, of course, there are usually new achievements that go along with new events, but it's generally wise to not spend all your Anka Tokens in case there's a big Token Shop update or something of the like.