Cash at the QOF level is generally a bad asset unless the QOF is conducting a business directly and requires the cash for legitimate business reasons, generally speaking. There is an exception for the receipt of brand new cash from a QOF investor. On the QOZB level, cash is explicitly subject to a working capital safe harbor if certain requirements are met. You should also note the difference between the 90% test for QOFs and the 70% test for QOZBs; the latter allows up to 30% "bad assets."