Bitcoin, Ethereum, Ripple… sound familiar? If you were one of those travelers frustrated by the closure of borders during the covid-19 pandemic, you may want to start taking an interest in cryptocurrency. Airlines, travel agencies and tourist offices are counting on it to lure back travelers and boost tourism around the world.  Spanish theme park PortAventura World announced a few days ago that it was adding Bitcoin as a means of payment in six of its hotels starting in 2022. Travelers who have never been interested in cryptocurrencies may be shaking their heads in bewilderment, trying to un…

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