What is the ruling on investing in a company that provides a fixed daily profit, and these profits are used for charitable work?

If websites give the investor a fixed percentage of the capital daily, and not a known percentage of the profit generated from the speculation, then this transaction is unlawful, and it is not permissible to engage in it with the intention of giving it as charity and spending it on acts of righteousness. This is because Allah has forbidden us from consuming wealth unjustly, and He does not accept charity from unlawful gains.