A handful of crypto whales appear to have made substantial Ethereum (ETH) purchases in recent days, an indication the largest crypto holders could be turning bullish on the second-biggest digital asset by market cap. The crypto tracker Lookonchain notes that a whale wallet potentially belonging to Tron (TRX) founder Justin Sun withdrew 4,666 ETH worth $14.91 million from the top crypto exchange Binance on Monday. The whale had already purchased 132,054 ETH worth $420 million since April 8th. A new whale wallet also withdrew 7,182 ETH worth $23.06 million from Binance over the course of the day on Monday, according to Lookonchain.