If the price rises by 10% to $11,000, the profit of $1,000 will be paid in BTC valued at the current market price ($11,000). In other words, the trader will earn a profit of 0.09 BTC or 9% on one BTC. On the contrary, if the market drops by 10% to $9,000, the trader will lose $1,000, amounting to a loss of 0.11 BTC or 11% on one BTC.
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