A mysterious cryptocurrency whale has caught the attention of the community earlier this week, after it moved nearly $505 million worth of the second-largest cryptocurrency by market capitalization, Ethereum ($ETH), to leading cryptocurrency exchange Binance.

The transactions, initially spotted by blockchain tracker Whale Alert, involved a mere 0.00183 ETH (approximately $3.38) in transaction fees. According to on-chain crypto analytics firm Santiment, the transaction represents one of the largest self-custody-to-exchange transfers in the past half-decade.