Yes, the 4 year locking will likely return higher profits compared to other locking periods. This is because it offers the highest annual percentage yield (APY) for Curve (CRV) holders, which is currently at 10.5%. This is significantly higher than the APY of other locking periods, such as 1 year (4.5%), 6 months (3.5%), and 3 months (2.5%). Furthermore, the 4 year locking period also offers the most secure investment option since it is the longest locking period available. This means that your funds will be locked in for a longer period of time, providing more stability and security for your investment.