The workplace messaging app's sale comes as the pandemic has increased the focus on remote work.
Research by leading international agency suggests only Argentina will be worst hit by the pandemic.
The digital currency has traded as high as $19,920.53, beating a record set in December 2017.
The Californian firm is launching its chip at a time of trade tensions between the US and China.
The move comes after the failure of last-ditch efforts to rescue the ailing department store chain.
Three stories of people working in hospitality who have set up new businesses during Covid-19.
Beijing has introduced tough new laws which restrict the export of "controlled items".