Huge Lag Spikes on using (WebClient webClient)

Hello, I am trying to get a live ethereum price variable for my game. It works fine but I get lag spikes everytime it updates (every 2 seconds).

Here is my code.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using System.Linq;
 using System.Text;
 using System.Net;
 using System;
 
 public class EthereumPrice : MonoBehaviour {
 
     public Text ethPriceText;
     public float time = 0;
 
     public void Start() {
         
         StartCoroutine(Example());
 
     }
 
     public void Update() {
 
         time += Time.deltaTime;
 
         if (time >= 1) {
             StartCoroutine(Example());
             time = 0;
         }
 
     }
 
     IEnumerator Example()
     {
         yield return new WaitForSecondsRealtime(1f);
         using (WebClient webClient = new System.Net.WebClient())
         {
             WebClient n = new WebClient();
             var json = n.DownloadString("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=USD");
             string valueOriginal = Convert.ToString(json);
             json = json.Replace("{\"USD\":", string.Empty);
             json = json.Replace("}", string.Empty);
             var sStrings = json.Split();
             float ethPrice = float.Parse(sStrings[0]);
             ethPriceText.text = "Ethereum ($" + ethPrice + ")";
             time += Time.deltaTime;
             Debug.Log (json);
 
         }
     }
 }
 

What the codes does is download the string from the JSON url and sets "json" to "{"USD":6790.55}". Then I use float.parse to take out the "{"USD":" and the "}" so I have 6790.55 left over. I then set this string as a float into a seperate variable. But for some reason I get massive lag spikes everytime it runs the Coroutine. Does anyone have any ideas?