IOTA has a few red flags: - partially closed source - has its own custom crypto - uses a bizarre internal trinary digit system, instead of binary - I've hea

IOTA has a few red flags: - partially closed source - has its own custom crypto - uses a bizarre internal trinary digit system, instead of binary - I've heard that it doesn't actually work, as in, you can't perform transactions In terms of the top ~25 coins by market cap, AFAIK RaiBlocks is the only feeless one which acutally works. Regardless, it's worth watching these coins to see how the economics work out.