I created a genesis.json initial\_key using very helpful instructions from [gensis.json initial key parameter: what is it?](https://eosio.stackexchange.com/questions/735/gensis-json-initial-key-parameter-what-is-it/787#787). 

My question - does the initial key have any crypto significance or is it simply a hash for nodes to verify if they are properly on the same network?

Do I need to keep the private key generated for the initial\_key safe? Does it have any use?