Poseidon hash for Ethereum is NOT secure!

A post on ethresear.ch argues that the Poseidon hash proposed for Ethereum is not secure, citing a classical preimage strength of 127.5 bits and a quantum preimage strength of 63.75 bits. The author claims Ethereum is making a very risky bet that the hash will not be cracked before a hard fork can address it. The discussion thread contains 15 posts from 4 participants.