If you go to https://coinmarketcap.com/currencies/gridcoin/
and click on the "Markets" tab
https://coinmarketcap.com/currencies/gridcoin/#markets
you can see where it is bought and sold
1 Bittrex
2 Poloniex
3 C-CEX
4 OpenLedge
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What was meant by the mainstream post was that Bitcoin uses a vast amount of energy and aside from warming homes inefficiently it is wasted.
Gridcoin has actually accomplished quite a bit, in terms of productive computing, even though it uses less electricity so far than btc.
What would happen if the computing power of btc were used by Gridcoin? Would that amount of computing power produce any useful scientific data?