Alex Gerko is a British-based billionaire.  Low-key and unassuming, he has an estimated fortune of £12 billion (€14.4 billion), most of which is attributable to XTX Markets, the vastly profitable algorithmic trading firm that he majority owns.  The firm makes its money by taking tiny margins on millions of daily trades across currency, debt, equity, commodity and crypto markets. However, given that it handles $250 billion worth of trades every day, those tiny margins add up to a significant sum. According to its most recent results, XTX made £1.5 billion in profits across its UK and Singapore entities last year.…