What is the ruling on the money earned by a hotel bellhop who was compelled to carry alcoholic beverages brought by guests, knowing that he invested this money in a project to earn a livelihood?

If you discover the presence of alcohol after the work is completed, then nothing is incumbent upon you, because you contracted for a permissible benefit and were unaware of what was in the bags. However, if you become aware of the presence of alcohol while carrying the bags, then it is not permissible for you to carry them, and you must repent. The money earned from this work is lawful, and if you invest it in a permissible project, then whatever comes from it is permissible.