This week Tech Tent is presented by Joe Tidy, who's been to El Salvador - which has bought thousands of bitcoins and become the first country in the world to make it legal tender. Now prices are crashing so will its experiment end in failure? Bitcoin podcast host Natalie Brunell and finacnail commentator Frances Coppola give their thoughts. Also: entrepreneurs at London tech week on their hopes and fears for the future. A Facebook moderator tells Chris Vallance of the strain of screening graphic content from the Ukraine war. And Liv McMahon pays the tech team's respects to Internet Explorer, put out to pasture after 27 years in which it transformed home computing.

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