Feature/refactor is cryptocurrency check (#4215)

* Refactoring

apps/api/src/services/cryptocurrency/cryptocurrency.service.ts

@@ -1,3 +1,5 @@
+import { DEFAULT_CURRENCY } from '@ghostfolio/common/config';
+
 import { Injectable } from '@nestjs/common';
 
 const cryptocurrencies = require('../../assets/cryptocurrencies/cryptocurrencies.json');
@@ -9,7 +11,11 @@ export class CryptocurrencyService {
 
   public isCryptocurrency(aSymbol = '') {
     const cryptocurrencySymbol = aSymbol.substring(0, aSymbol.length - 3);
-    return this.getCryptocurrencies().includes(cryptocurrencySymbol);
+
+    return (
+      aSymbol.endsWith(DEFAULT_CURRENCY) &&
+      this.getCryptocurrencies().includes(cryptocurrencySymbol)
+    );
   }
 
   private getCryptocurrencies() {

apps/api/src/services/data-provider/financial-modeling-prep/financial-modeling-prep.service.ts

@@ -11,7 +11,6 @@ import {
   IDataProviderHistoricalResponse,
   IDataProviderResponse
 } from '@ghostfolio/api/services/interfaces/interfaces';
-import { DEFAULT_CURRENCY } from '@ghostfolio/common/config';
 import { DATE_FORMAT, parseDate } from '@ghostfolio/common/helper';
 import {
   DataProviderInfo,
@@ -66,10 +65,7 @@ export class FinancialModelingPrepService implements DataProviderInterface {
     };
 
     try {
-      if (
-        symbol.endsWith(DEFAULT_CURRENCY) &&
-        this.cryptocurrencyService.isCryptocurrency(symbol)
-      ) {
+      if (this.cryptocurrencyService.isCryptocurrency(symbol)) {
         const [quote] = await fetch(
           `${this.URL}/quote/${symbol}?apikey=${this.apiKey}`,
           {