After its launch in 1999, the euro immediately became the world's second-leading international currency, although a recent financial crisis across a number of euro member countries casts some doubt about the stability, or even its long-term viability, of the euro.

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The euro quickly ascended to become the world's second-leading international currency after its launch, reflecting its wide acceptance for international transactions and reserves. Despite facing significant challenges from financial crises in several member countries, which raised concerns about its stability and future, the euro has maintained its position as a major global currency.

After Its Launch in 1999, the Euro Immediately Became the World's