Coinbase's product head Conor Grogan stated that the $8.6 billion Bitcoin transfer that occurred last Thursday—involving eight wallets that had not been used for over 14 years—has a low probability of being the result of a hacker attack. If confirmed, this could be the largest theft in history.
"If true (I want to emphasize that I am speculating on the possibility here), this would be the largest robbery in human history to date," Grogan said in a post on X on Friday, suggesting a small possibility that the $8.6 billion worth of Bitcoin (BTC) transferred from eight independent wallets could be the work of malicious actors.
"The recently awakened $8 billion BTC has a low probability of being hacked or having private keys stolen," Grogan said, noting a suspicious Bitcoin Cash (BCH) transaction prior to the significant transfers on Thursday, which involved 10,000 BTC each.
"I found that one of the BTC whale clusters conducted a BCH test transaction 14 hours ago, and then transferred the entire amount. An hour later, the BTC wallets began transferring," he said.
Grogan indicated that the wallet owners might have been quietly testing their private keys, as Bitcoin Cash transactions do not attract the same attention from whale tracking services as Bitcoin does. However, he reiterated that such behavior is unusual:
In a post on the same day, blockchain intelligence firm Arkham stated that a single entity transferred $8.6 billion worth of Bitcoin from eight independent wallets.
Arkham noted that all the Bitcoin was transferred into the original wallets on April 2 or May 4, 2011, and had been held in those wallets for over 14 years.
Arkham stated that the Bitcoin is now stored in eight new wallets and has not been transferred again since.
Despite the uncertainty, Bitcoin prices have remained relatively stable, with CoinMarketCap data showing that BTC has dropped 1.02% in the past 24 hours, trading at $108,150 at the time of writing.
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