title: Is it better to have one observer of whole object or several of its children
body: <p>Assume simple character model like</p>
  
  <pre><code>character: {
    gold: 1000,
    health: 100,
    mana: 50
  }
  </code></pre>
  
  <p>Client will subscribe to firebase to listen for changes in <code>gold</code>, <code>health</code> and <code>mana</code>. What is recommended way in terms of data usage / firebase pricing / performance to do this?</p>
  
  <p>Should I subscribe to changes in <code>character</code> or have 3 subscribers to each value?</p>