Max Foster is live from London. Here are the top business news stories today!\n\nLegal tender - El Salvador becomes the first country to accept bitcoin as a currency. Brazil protests - demonstrators take to streets on Independence Day. Trade record - China's imports and exports surge despite fears over Covid.\n\nIt\u2019s Tuesday, let\u2019s make a move.\nTo learn more about how CNN protects listener privacy, visit cnn.com/privacy\nLearn more about your ad choices. Visit megaphone.fm/adchoices