Yep. I recently reached 100$ and now i have around 150$ but i don't want to receive my payment yet. Google already send me an email tellling me i'm ready to receive my payments (just need to give my bank account for the transference) but i prefer to let it there for a while. Is there any problem in let the money just acumulate there?
But I wont recommend you go on holding payment for several months. Adsense can ban you for some silly reason and you wont get a penny. Also they wont pay you any interest for it.
Put them on hold i have them on hold since i created my account 18 months ago (first 6 months didn't do nothing with it)