what is bitcoin backed by, Overview

[Review of A-shares on December 13th: There should be at least one shrinking K-line in the market next week before it can stop falling][Evaluation of Yibo A shares on December 13: There should be at least one K-line with a small contraction in the market next week before it can stop falling][Evaluation of Yibo A shares on December 13: There should be at least one K-line with a small contraction in the market next week before it can stop falling]

[Review of A-shares on December 13th: There should be at least one shrinking K-line in the market next week before it can stop falling][Evaluation of Yibo A shares on December 13: There should be at least one K-line with a small contraction in the market next week before it can stop falling]

[Evaluation of Yibo A shares on December 13: There should be at least one K-line with a small contraction in the market next week before it can stop falling]