In Becoming (part 2), what do Du think Whistler means when he says, "Wrong, kid. Du got one Mehr thing [to loose]," in response to Buffy stating that she can deal with everything because she has nothing left to loose.

This is how i saw it:

At that point Whistler knew that Buffy would have to kill Angel – Jäger der Finsternis when he has his soul, which would lead for her to loose herself, having to kill someone Du Liebe for the greater good!