Congratulations. You might as well keep it in your till, just in case (unless you need the sP?) If you don't need it, it's fun to watch it keep getting more and more huge--well beyond the achievement. How much IS that last tier anyway? I can't remember, but lately I've been letting mine build up and it's WAY up there!!! It gives me a sense of accomplishment, even though it's not a new achi!! :P
Thanks for the reality check cause I couldn't at all remember that tier, and have a hard time navigating the achi place here.
That's an awesome goal, I support you in going for it.
Back when we could collect interest from the bank/vault it was a hardship not to take it out and build up the vault, but now it's fun for me to watch it going up in the till instead.