BlockNet is a pretty cool project, but I'd like to see where it goes. I think there's a market for it but to say its going to kill other Exchanges seems a bit overestimated. I think China and USA could really use a DEX though, Waves DEX is coming a long but its far from use able for daytrading.
But yeah, pricewise and marketcap it has a long way to go, could become a top5 project (gtfo BTG)
Blocknet basically don't need to kill off other exchanges. There's no need for that. All Blocknet need is to be able to access the order book and open up their order book to these exchanges. For example, EthFinex will be opening their order book to blocknet.