Well, there is a SA article out arguing this is worth very little and the claims of the article are impossible to assess within the confines of a single trading day. Two possibilities;
- A substantial part of it is true
- It's a very nasty short attack
It's probably wisest to sell at least part of your holdings, even if the article is BS (some parts aren't, but we're talking about the general meaning) it will go lower and it's probably difficult to recover from it, so why take the chance..