Cryptocurrency retail investors are showing signs of transitioning into long-term holders, as Bitcoin (BTC) and Ethereum (ETH) have recently flowed out of CEX. New data shows that the CEX balances of the two major cryptocurrencies have dropped to nearly a four-year low, which analysts interpret as a bullish signal for the future. The total amount of Bitcoin in CEX has fallen to less than 2.3 million coins, equivalent to $158 billion, while the total amount of Ethereum has fallen to less than 16 million coins, equivalent to $58 billion.