How is Zakat to be paid on 350 million that was recently gained and has reached the Nisab, knowing that paying 2.5% annually (8.75 million) is considered a large sum that may lead to a loss, especially since the amount is not expected to increase much in the future?

Funds derived from a commercial transaction are subject to the zakat (definition) of their original commercial asset if a full year has passed over the asset after it reached the minimum threshold (85 grams of gold or 595 grams of silver), and the zakat rate is 2.5%. However, if the transaction was the sale of a property held for personal use or a brokerage deal, then zakat is not obligatory on the profit until a full year has passed over it from the time it was acquired. Zakat is a blessing for wealth and its owner, and a purification for the soul. A Muslim pays the zakat on his wealth with a willing heart.