Quick TakeMajor crypto exchanges that spoke with The Block are closely monitoring Ethereum Classic to decide whether to delist the coin after it recently suffered two 51% attacks.At least one exchange — Poloniex — did consider delisting ETC after the attacks, but ultimately decided against it. OKEx told The Block that it would be “forced to delist” ETC if the ETC community fails to prevent further attacks.Terry Culver, CEO of ETC Labs, told The Block that the “real solution is to make mining ETC more profitable as soon as possible,” and that shifting to a new mining algorithm will take “at least 6-9 months.”