Golos is due a pump, that's for sure. But they're on Bittrex and it doesn't attract as many pumps as coins on Poloniex (though nearly dead coins like Reddcoin had a recent pump on Bittrex, so anything is possible).
If Golos could get themselves listed on more exchanges, they have more of a chance of being pumped.
I'm not so sure its due a pump, I more believe its simply undervalued. I believe the price will increase once people do the math and realize how undervalued Golos is vs other alt coins.
Also - Bittrex trading volumes have increased hugely during the past few months. I remember in early March 2017 Bittrex was doing about 2,000 BTC volume a day (when BTC was worth about $1,200).
Now Bittrex is doing about 35,000 BTC a day when BTC is worth about $2,000.
Thats a USD trading volume increase of about 30,000% in less than 3 months. There's no lack of volume on Bittrex