No, the top-up and matching grant are meant to boost your retirement savings for higher monthly payouts, hence they cannot be withdrawn in a lump sum or used for other purposes. They will be paid out to you as part of your boosted monthly payouts in retirement. If you are currently receiving CPF LIFE monthly payouts, the top-up and the matching grant will be used to increase your CPF LIFE premium, which will in turn increase your monthly payouts.