Foreign exchange expert Richard Duncan has warned that the contraction of the US manufacturing industry may leave the country with an insurmountable budget deficit within the next decade that will put the dollar in jeopardy.The analyst, who authored The Dollar Crisis in 2003 and is currently based at Blackhorse Asset Management in Singapore, told Bloomberg that with a contraction in the volume of exportable goods, the US will have little hope of levelling its debt mountain.He warned: "Eventually it will lead to high rates of inflation well down the line and really destabilise things to the point where there may be irreparable damage. A kind of 'Fall of Rome' scenario."However, John Normand, global head of FX strategy at JPMorgan, has insisted that the dollar is not yet witnessing a crisis.In an interview with the Financial Times, he explained that while there is evidence demonstrating that the dollar's share of total currency reserves is shrinking, it still attracts a high absolute level of official financing.