I would not wait for an increase in volume, I don't think it will ever come.
Mt Gox ruined that trust, these exchanges are just too amatuer. Nobody feels comfortable putting large amounts of fiat/coins into them anymore. Large buyers and sellers will wait for institutional level exchanges, and in the meantime the buying will happen through Second Market, dark pools, and directly from miners.
There won't be an uptick in volume on Bitstamp, the stream of coins coming in for sale will slowly dwindle as the off chain buying increases. You will wait for large volume, but suddenly there will hardly be any coins for sale. Buying on Stamp-level exchanges will be for small fish and last-resort larger traders.
Nailed it.