Without trying to sugarcoat this, it's still too early to say it is officially worthless. In my opinion Kate and potentially the other founders and operators of Ciphermine are personally liable to redeem the bond. If I'm right, the only way the bond is not repaid in full is if they all go bankrupt.
I've reported Kate to the FCA in the UK. I believe others intend to do the same. All I can suggest at the moment is to wait and see how things develop.
My recollection is that DMS's share of the bonds was about 250 BTC, and the remaining value of the fund was 150 BTC in cash.
The problem is then that DMS holders would have to prove ownership of DMS. This could prove difficult without the help of Deprived or burnside. Even if the ownership is proven, Kate can - and I think she will - at least stall paying to the owners directly rather than to Deprived/DMS.