well you own 2 duds of the JSE...Long term they may be bust and gone!!! 
I hope not
They aren't a large part of the total amount I have invested in the JSE, so one or two going bust is not a too big thing (though definitely not what I ideally want!)
VIL: I have hope of a recovery to 100c+ if they manage to sell their underperforming assets (Cons Murch, etc) and it should be noted that the market cap is only a fraction of the value of Tau. But again, the value will only be realised if management gets themselves in gear....
RSG: If they can get the rest of their financing sorted, we will see a jump in share price quite quickly. Once (/if) production starts I would expect RSG to perform really well (scheduled for June 2016, hopefully no more delays...)