Even for someone as independently wealthy as Sir Jim Ratcliffe, investing in Man United is a major gamble. The 71-year-old’s fortune spans around £23bn and he has a diverse portfolio across several industries, including his almost bulletproof multinational chemicals company Ineos. The exact breakdown of his deal to purchase 27 per cent of Man United from the Glazer family in February is not known, although we do know it has not been financed by debt or loans. it is believed that Ratcliffe fronted at least some of his personal wealth to finance the deal, as well funding from Ineos and potential…