I wouldn't trust or listen to Bram Cohen at all, he tries to come off like he knows what he is talking about but he doesn't know anything. He used to say bitcoin was a scam and a ponzi now he's pro bitcoin and started bashing on altcoins. I can't find the stupid posts he made before about bitcoin but here is one where he is saying mining is a waste and that people can't solve it back in 2015. Based on that video you can say bitcoin is still producing "waste" with its mining and that other forms of mining doesn't work too because of "waste" and issues like centralization. Guess bitcoin is done for lets move onto proof of stake since there is no mining "waste." I think it's wrong to say proof of work is a waste it's necessary for security and decentralization compared to other options.
Burstcoin mining is really efficient on electricity/cpu/gpu you won't even notice the miner running. It's basically free money compared to some of the other coins on the market. The market cap for burst been raising steadily and will continue to raise because the Asset exchange is providing some real service that is useful and can gain money from outside sources. I don't think burst's proof of space will make it big but the community, market and the AE's use case will make it big.