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by CryptoPunk 3093 days ago
A word of caution: while DAG-only chains are a promising area of research for cryptocurrency data structures, there are many unresolved problems with them.

IOTA solves it with a centralized coordinator and claims to have decentralized solutions being planned. RaiBlocks is, in my opinion, more honest about its vulnerabilities and its progress in solving them (they say they're working on it). Since RaiBlocks has no centralized coordinator, it could come under attack as soon as a shorting market emerges for it.