The latest Bitcoin rally saw buying from Coinbase exchange whales, according to CryptoQuant CEO.The Bitcoin Coinbase Premium Index, which indicates the difference in BTC price on Coinbase and Binance, turned positive during the rally.Coinbase's US-based investors, including large institutional traders, contributed to the buying pressure on the platform.The positive spike in the Bitcoin Coinbase Premium Index coincided with the price recovery above $94,000.