Is it permissible to invest in permissible areas for a company that deals in unlawful Forex, knowing that it offers variable daily profits and terminates the contract when the profit reaches 150%, which necessitates renewing the purchase of shares?

For investment in any company to be permissible, the capital must be invested in a permissible field, the principal must not be guaranteed but rather be subject to profit and loss, and a known percentage of the profit, not the capital, must be agreed upon. The mentioned company's agreed-upon profit percentage is not clearly stated, and the daily percentage fluctuating between 0.25% and 2.25% is insufficient to permit dealing with it. In fact, it increases the prohibition for two reasons: the ambiguity of the profit percentage, and that the percentage is from the principal, not from the company's profit, both of which invalidate the contract. If the contract ends when the investor reaches 150%, then if the intention is to liquidate the first company and the participant takes their profits and capital, then starts another company, there is no harm. It is permissible to take a commission for referrals if the new members do not pay subscription fees. In conclusion, the company is impermissible due to the ambiguity in the profit percentage and because it is closer to an interest-based loan with capital guarantee. It is not advisable to deal with companies whose dealings are difficult to ascertain or companies involved in prohibited activities.