SAN SALVADOR, El Salvador (AP) — El Salvador became the first country to adopt Bitcoin as legal tender Tuesday, but the rollout stumbled in its first hours and President Nayib Bukele said the digital wallet used for transactions was not functioning.
In particular, the activities of miners — cryptocurrency users who leverage vast amounts of computing power to record transactions, receiving newly created cryptocurrency units and transaction fees paid by other users in return — are critical to currencies’ stability and smooth function.

FACEBOOK WHISTLEBLOWER GOES PUBLIC: “The former Facebook Inc. employee who gathered documents that formed the foundation of The Wall Street Journal’s Facebook Files series said she acted to help prompt change at the social-media giant, not to stir anger toward it,” the Journal’s Jeff Horwitz wrote in a profile of Frances Haugen, a former product manager hired to help protect against election interference on the platform. She “said she had grown frustrated by what she saw as the company’s lack of openness about its platforms’ potential for harm and unwillingness to address its flaws. She is scheduled to testify before Congress on Tuesday. She has also sought federal whistleblower protection with the Securities and Exchange Commission.”
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