Yes - I think there is concern. REU has much lower cash reserves than they would like to have (hence the panic over the Credit Suisse margin call). However, whilst there are concerns I don't think they have been realised as yet and REU appears to be trading profitably (albeit on a bit of a knife edge).
But here's the neat thing. If REU was insolvent it would not actually be that bad. The NTA is more than 10 times the SP so if REU was wound up you'd probably get your money back and some.
Obviously DYOR but I think this is a good buy (rather than a goodbye).
REU Price at posting:
0.0¢ Sentiment: LT Buy Disclosure: Held