diff --git a/GradDemo.Api/Controllers/CryptoController.cs b/GradDemo.Api/Controllers/CryptoController.cs
index cdbca2f..7ecb227 100644
--- a/GradDemo.Api/Controllers/CryptoController.cs
+++ b/GradDemo.Api/Controllers/CryptoController.cs
@@ -44,5 +44,28 @@ public async Task<Response<CryptoCoinResponse>> GetCoin(string coinId, string cu
 
             return Response<CryptoCoinResponse>.Error("Something went wrong");
         }
+
+        [HttpGet("GetAllCurrencies")]
+        public async Task<Response<string[]>> GetAllCurrencies()
+        {
+            string[]? res;
+
+             res = await _coinGeckoProvider.GetAllCurrency();
+
+            if (res != null)
+            {
+                return Response<string[]>.Successful(res);
+                
+            }
+
+            return Response<string[]>.Error("Something went wrong");
+        }
+
+        [HttpPost("{CurrencySymbol}")]
+        public void SetCurrencyPreference(string CurrencySymbol)
+        {
+            // what should I do???
+        }
+
     }
 }
diff --git a/GradDemo.Api/Controllers/Currency.cs b/GradDemo.Api/Controllers/Currency.cs
new file mode 100644
index 0000000..0c4bd22
--- /dev/null
+++ b/GradDemo.Api/Controllers/Currency.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace GradDemo.Api.Controllers
+{
+    public class Currency
+    {      
+        public string? Symbol { get; set; }
+    }
+}
diff --git a/GradDemo.Api/Controllers/CurrencyBase.cs b/GradDemo.Api/Controllers/CurrencyBase.cs
new file mode 100644
index 0000000..9d34e81
--- /dev/null
+++ b/GradDemo.Api/Controllers/CurrencyBase.cs
@@ -0,0 +1,7 @@
+namespace GradDemo.Api.Controllers
+{
+    public abstract class CurrencyBase
+    {
+        public abstract string Symbol { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/GradDemo.Api/Providers/CoinGeckoProvider.cs b/GradDemo.Api/Providers/CoinGeckoProvider.cs
index 7885a9b..260a1d7 100644
--- a/GradDemo.Api/Providers/CoinGeckoProvider.cs
+++ b/GradDemo.Api/Providers/CoinGeckoProvider.cs
@@ -1,4 +1,5 @@
-using GradDemo.Api.Models.CoinGecko;
+using GradDemo.Api.Controllers;
+using GradDemo.Api.Models.CoinGecko;
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
@@ -43,5 +44,22 @@ public CoinGeckoProvider(string baseUrl)
 
             return null;
         }
+
+        public async Task<string[]?> GetAllCurrency()
+        {
+            string[]? resultValue = null;
+
+            string url = $"/api/v3/simple/supported_vs_currencies";
+            HttpResponseMessage response = await client.GetAsync(url);
+            if (response.IsSuccessStatusCode)
+            {
+                var res = await response.Content.ReadAsStringAsync();
+                var coinGeckoResult = JsonConvert.DeserializeObject<string[]?>(res);
+                resultValue = coinGeckoResult;
+                return resultValue;
+            }
+
+            return null;
+        }
     }
 }
diff --git a/GradDemo.Api/Startup.cs b/GradDemo.Api/Startup.cs
index 7f7b37b..aec0d3f 100644
--- a/GradDemo.Api/Startup.cs
+++ b/GradDemo.Api/Startup.cs
@@ -82,7 +82,7 @@ public void Configure(IApplicationBuilder app, IWebHostEnvironment env, Applicat
             {
                 db.Database.Migrate();
             }
-            
+
         }
     }
 }
diff --git a/GradDemo.Tests/CallHelper.cs b/GradDemo.Tests/CallHelper.cs
index 32198f4..74df71e 100644
--- a/GradDemo.Tests/CallHelper.cs
+++ b/GradDemo.Tests/CallHelper.cs
@@ -20,7 +20,7 @@ public static class CallHelper
             var content = new StringContent(JsonConvert.SerializeObject(input), Encoding.UTF8, "application/json");
             var result = await client.PostAsync(path, content);
             var resultContent = await ParseContent<T>(result.Content);
-            return (resultContent, result);
+            throw new Exception("test fail");
         }
 
         private static async Task<T?> ParseContent<T>(HttpContent content) where T : class
diff --git a/GradDemo.Tests/UnitTest1.cs b/GradDemo.Tests/UnitTest1.cs
index a728f53..5b00013 100644
--- a/GradDemo.Tests/UnitTest1.cs
+++ b/GradDemo.Tests/UnitTest1.cs
@@ -135,5 +135,21 @@ public async Task TestGetCurrency()
 
             Assert.IsTrue(usdResult.content.Payload.Value < zarresult.content.Payload.Value);
         }
+
+        [Test]
+        public async Task TestSetCurrencyPref()
+        {
+            
+            string currencyPref = "usd";
+            var usdResult = await CallHelper.GetAndDeserialize<Response<string>>(_httpClient, $"/api/v3/simple/price?ids=bitcoin&vs_currencies={currencyPref}");
+
+            Assert.IsTrue(usdResult.httpResponse.IsSuccessStatusCode);
+
+            
+
+            Assert.IsTrue(usdResult.httpResponse.IsSuccessStatusCode);
+
+            Assert.IsTrue(usdResult.content.Payload == currencyPref);
+        }
     }
 }
\ No newline at end of file