Bitcoin SV, a controversial fork of bitcoin created in the aftermath of the 2017 blocksize wars, has suffered a “massive” attack that may have been an attempt to destroy the cryptocurrency.

Sign up now for the free CryptoCodex—A free, daily newsletter for the crypto-curious. Helping you understand the world of bitcoin and crypto, every weekday

MORE FROM FORBESCrypto Price Prediction: Why Bitcoin Could Hit $700,000 In Just 10 Years

The bitcoin SV price, which hasn’t climbed along with bitcoin and other major cryptocurrencies this past year, has lost around 5% since the so-called 51% attack.

Such attacks are attempts by miners that secure cryptocurrency blockchains in return for tokens to overwhelm the network and reorganize the record of transactions, potentially