What is the ruling on investing in Silwana Diamond Company, which allows the purchase of shares with a new digital currency, with a marketing system that grants a monthly salary in exchange for bringing in new investors, and is this investment considered usury?

For investment in companies to be permissible, the field of investment must be lawful, and the company must not guarantee the capital, as this would transform it into an interest-based loan. There must be an agreement on a percentage of the profit, not the capital. Furthermore, the company must avoid interest-based borrowing or depositing funds in interest-bearing accounts. Network marketing based on gambling and games of chance, which requires paying a subscription or purchasing a product in exchange for potential gain, is forbidden.