Scene changes, data save and ienumerators? HELP

Hey,

My last question on here got deleted which is really annoying, because other answers on similar questions doesn't help me. Don't remove my question!

So I'm making this clicker game, and I have two scenes so far. The "MainScene" and the "StatScene". You get coins by clicking and buying upgrades on the "MainScene", this is where I have my main script on a gameobject, which controls everything. I then wanted to implement a feature where they could click on a "Stats" button, to see their stats. When I click on this stats button and go to my "StatScene", all my stats are showing, exactly how I want it to. Now, my problem is, when I click my "back" button, all progress is reset, my IENumerator TimerRoutine which gives coins every second is stopped, my texts and buttons are not referenced in the script either anymore. (Like in the inspector, they're not assigned/attached to the script.)

How can I make so the data saves/the coins still adds up in my other scene, WHILE I can access the data in my "StatScene", without losing progress?

Thanks in advanced. Here's some of my code.

 void Awake () {
         DontDestroyOnLoad(transform.gameObject);
         StartCoroutine(TimerRoutine());
         if (FindObjectsOfType(GetType()).Length > 1)
         {
             Destroy(gameObject);
         }

Here's my scene change code, here I tried to store my data in PlayerPrefs. It worked. But the script is still "paused" when I return to my MainScene. My main script on my main object in mainscene still has the values stored in it, but the texts are not linked which results in the data not showing on the screen. Also, my TimerCoroutine which is basically a timer, that adds coins every second, is stopped.

 void SwitchSceneStats()
     {
         PlayerPrefs.SetFloat("Ghz", ghz);
         PlayerPrefs.SetFloat("xtra", xtraBtcPerClick);
         PlayerPrefs.SetInt("timesClicked", timesClicked);
         PlayerPrefs.SetInt("itemsOwned", itemsOwned);
         PlayerPrefs.SetFloat("alltimeBTC", alltimeBtc);
         PlayerPrefs.SetFloat("btcSpent", btcSpent);
         PlayerPrefs.SetInt("timePlayed", timePlayed);
         PlayerPrefs.SetInt("hasTor", hasTor);
         SceneManager.LoadScene("StatsScene");
         StopAllCoroutines();        
     }

Here's my IENumerator TimerRoutine:

 public IEnumerator TimerRoutine()
     {
         while (currentBtc < 99999999999)
         {
             yield return new WaitForSeconds(wait);
             currentBtc += ghz;
             alltimeBtc += ghz;
             btcCounter.text = currentBtc.ToString("#.00000000");
             textMMPrice.text = miniMinerPriceToUSD.ToString("Price: $##0.00");
             btcKurs = currentBtc * 18000;
             btcToDollars.text = btcKurs.ToString("$#0.000");
             textAsicPrice.text = asicMinerPriceToUSD.ToString("Price: $##.00");
             textTorPrice.text = torBrowserPriceToUSD.ToString("Price: $##.00");
             timePlayed++;
         }
     }