Delegating your ADA to a stake pool is crucial for a number of reasons. Most importantly, by participating in staking, you are helping to secure the network. Secondly, in return for your participation you will receive ADA rewards when the pool produces blocks. You can check the estimated staking rewards by using the Cardano Reward Calculator. Finally, by delegating to a pool like ICRYP, you are helping to promote the decentralisation of the network and are supporting a Cardano Community stake pool.