Should usurious money be disposed of when speculating in prohibited stocks?

It is impermissible to buy or speculate with shares of usurious banks and similar institutions. Whoever engages in such an act is entitled only to their principal capital. Any amount exceeding that is illicit wealth that must be disposed of by spending it on Muslim welfare or giving it to the poor and needy. It is not permissible to invest it or trade with it. One must repent to Allah for trading in forbidden things by ceasing such actions, regretting them, and resolving never to return to them.