What is the ruling on money acquired from the currency exchange after the Islamic Fiqh Academy prohibited the transaction, and what should be done with it, especially given one's accustomedness to a luxurious life supported by this money?

Corruption in currency trading arises from delayed possession and disparity when the same currency type is involved. Currencies are treated like gold and silver. Thus, if a currency is sold for the same currency type with disparity and without immediate possession, two types of riba (usury/interest) occur. If the two currencies are different but immediate possession does not occur, it constitutes riba al-nasi'ah (usury of delay). The corrupted contract must be nullified and the transaction reversed. Since reversal is impossible in the stock market, the repentant individual must dispose of the illicit gains from corrupted speculations that were not legitimately acquired through the contract. They are entitled to their capital, and any surplus should be returned to its owner or, if that is not possible, spent on the welfare of Muslims. As for legitimate speculations, their profits are permissible. If lawful and unlawful funds are mixed and the exact amount is unknown, half of it should be given away.