Are the profits from money deposited in a usurious bank for my daughter unlawful, and is it permissible to purchase investment certificates with this money and benefit from its profits for living expenses?

If it is possible to withdraw money from a usurious bank, one must hasten to do so, and not delay. However, if the deposit was obligatory, then there is no sin in leaving it until it is possible to withdraw it, and its presence in the bank is a necessity estimated by its extent. It is not permissible to purchase usurious investment certificates, nor to take any usurious interest on this deposited money. Rather, the interest should be taken and disbursed to the poor Muslims or for their general welfare, by way of riddance, not as charity.