Yes, you can deposit without staking, but you will not be able to earn LDO rewards. Staking your LDO tokens is the only way to earn rewards, as it helps to secure the network and allows users to participate in the network's governance. Staking also gives users access to additional features and benefits, such as voting on network changes, participating in network governance, and earning rewards for providing liquidity. Therefore, if you want to earn rewards from your LDO tokens, it is best to stake them.