Rejecting ideas because you don't understand them certainly is.
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For many Westerners, this may seem insignificant, as the banking and financial system is (still) more or less functional. Nevertheless, could you imagine having to rely on Bitcoin for your family's everyday spending budget? Or having to manage your treasury when you're a small business with customers and suppliers operating in (or indexed to) fiat currency?
This.
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Few.
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Trading is also essential for businesses that are exposed to market risk, such as operating accross multiple currencies or needing to buy or sell commodities whose prices are volatile. Derivative contracts allow them to hedge out this volatility and have a predictable balance sheet.
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