how many virtual currencies are there, Knowledge graph

[Afternoon comment on A-shares on December 10th: There will be action to cover the gap in the afternoon market][Afternoon comment on A-shares on December 10th: There will be action to cover the gap in the afternoon market][Afternoon comment on A-shares on December 10th: There will be action to cover the gap in the afternoon market]

[Afternoon comment on A-shares on December 10th: There will be action to cover the gap in the afternoon market][Afternoon comment on A-shares on December 10th: There will be action to cover the gap in the afternoon market]

[Afternoon comment on A-shares on December 10: There will be action to cover the gap in the afternoon market][Afternoon comment on A-shares on December 10: There will be action to cover the gap in the afternoon market]