Why wouldn't you just setup a traditional market like we do with other commodities, rather than a blockchain? If you are trading in something that exists in the

Why wouldn't you just setup a traditional market like we do with other commodities, rather than a blockchain? If you are trading in something that exists in the real world (like energy savings), you already need some central authority to verify people are being honest, so a blockchain doesn't provide any benefit over having that central authority manage the data. I love the idea of having markets for more things (ex. in Ontario we have cap and trade for carbon emissions), but the blockchain idea makes no sense.