The Ltc investment option hasn't been discussed about for a while now so maybe best to put that on hold for now and concentrate on ethereum being added as a option for another alt coin to use on the site instead.
They have been talking about a possibility of having an eth exchange but only if it is viable to operate as it was in trial for ltc but it did not work out so it was scraped.
Just hope they will be able to modify this exchange to work with ethereum and put an acceptable amount to charge as a fee to complete these trades for both parties involved.