Bancor is nothing more than a merger of 2 already existing platforms. First is the ability to seamlessly swap one token for another. This is what shapeshift does and it does it very well. Second you will have the ability to create any tokens you want with ease. This is what the waves platform does. Waves platform is also a dex where the created tokens can be traded. Sorry but Bancor sounds like a loser to me
First: the diff between Bancor and everything else that enables a swapping of tokens is that Bancor allows for a swapping of tokens WITHOUT needing to find a counterparty. This means that even small market-cap currencies with low trading volumes (think of the countless community/complimentary/business-based currencies for example) is always completely liquid.
Second: same as first. Yes Waves enables trade, but its still P2P and requires a counterparty.
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Additionally, there's the heretofore unheard of use cases like creating Token Baskets (like decentralized ETFs), and creating a currency that is minted/destroyed constantly based on demand;