批评此代码

该代码是一个简单的控制台应用程序，用于随机更新汇率。我按照我的训练计划编写了它，并在这段代码中实现了delegate和event。版本.NET- 4.8

代码写得有多糟糕？应该做出哪些改变？

using System;
using System.Collections.Generic;

namespace CryptoBot
{
    public class Program
    {
        public static Dictionary<string, decimal> CryptoValute = new Dictionary<string, decimal>();
        public static decimal ForExtemeValue;

        private static int _count = 0;

        static CryptoPriceMonitor priceMonitor = new CryptoPriceMonitor();
        static TraderBot traderBot = new TraderBot(priceMonitor);

        public static void PrintColor(string message, ConsoleColor color)
        {
            Console.ForegroundColor = color;
            Console.WriteLine(message);
            Console.ResetColor();
        }
        static void Main(string[] args)
        {
            CryptoValute.Add("Bitcoin", 50000);
            CryptoValute.Add("DogeCoin", 3);
            CryptoValute.Add("Ethereum", 1680);
            CryptoValute.Add("USDT", 26);

            PrintColor("Choose valute: Bitcoin, DogeCoin, Ethereum, USDT", ConsoleColor.Green);
            PrintColor("Current Prices:", ConsoleColor.Green);

            foreach (var price in CryptoValute)
            {
                Console.WriteLine(price);
            }

            string Choose = Console.ReadLine();

            while (true)
            {
                switch (Choose)
                {
                    case "Bitcoin":
                        ForExtemeValue = CryptoValute["Bitcoin"];
                        Iterations("Bitcoin");
                        Choose = Console.ReadLine();
                        break;

                    case "DogeCoin":
                        ForExtemeValue = CryptoValute["DogeCoin"];
                        Iterations("DogeCoin");
                        Choose = Console.ReadLine();
                        break;

                    case "Ethereum":
                        ForExtemeValue = CryptoValute["Ethereum"];
                        Iterations("Ethereum");
                        Choose = Console.ReadLine();
                        break;

                    case "USDT":
                        ForExtemeValue = CryptoValute["USDT"];
                        Iterations("USDT");
                        Choose = Console.ReadLine();
                        break;

                    default:
                        PrintColor("There is no currency on the list.", ConsoleColor.Green);
                        Choose = Console.ReadLine();
                        break;
                }
            }

        }

        private const int IterationsCount = 1000;
        public static void Iterations(string name)
        {
            string valute;
            decimal value;

            _count = 0;
            valute = name;
            value = CryptoValute[name];

            while (_count != IterationsCount)
            {
                _count++;
                value = CryptoValute[name];
                priceMonitor.UpdatePrice(value, valute);
            }

            Console.Clear();
            PrintColor($"Here are a {IterationsCount} last iterations", ConsoleColor.Green);
            PrintColor("Choose valute: Bitcoin, DogeCoin, Ethereum, USDT", ConsoleColor.Green);
            PrintColor("Current Prices:", ConsoleColor.Green);

            foreach (var price in CryptoValute)
            {
                Console.WriteLine(price);
            }           
        }
    }
    public class CryptoPriceMonitor
    {
        public void UpdatePrice(decimal oldPrice, string name)
        {
            decimal currentPrice = oldPrice;

            PriceChanged?.Invoke(oldPrice, ExtremeValues(currentPrice), name);
        }

        private Random _random = new Random();
        private int _procent;
        private const int MaxRandomProcent = 8;
        private const int MinRandomProcent = -7;
        private decimal ExtremeValues(decimal basePrice)
        {
            decimal newPrice = basePrice;
            decimal maxValue = Program.ForExtemeValue * 100;
            decimal minValue = Program.ForExtemeValue - (Program.ForExtemeValue * 90) / 100;

            if (basePrice >= maxValue)
            {
                _procent = _random.Next(MinRandomProcent, 0);
                newPrice -= (basePrice * Math.Abs(_procent)) / 100;
                return newPrice;
            }
            if (basePrice <= minValue)
            {
                _procent = _random.Next(1, MaxRandomProcent);
                newPrice += (basePrice * Math.Abs(_procent)) / 100;
                return newPrice;
            }
            else
            {
                _procent = _random.Next(MinRandomProcent, MaxRandomProcent);
                if (_procent > 0)
                {
                    newPrice += (basePrice * Math.Abs(_procent)) / 100;
                    return newPrice;
                }
                else
                {
                    newPrice -= (basePrice * Math.Abs(_procent)) / 100;
                    return newPrice;
                }
            }
        }

        public delegate void PriceChangeHandler(decimal oldPrice, decimal newPrice, string valute);
        public event PriceChangeHandler PriceChanged;
    }

    public class TraderBot
    {
        public TraderBot(CryptoPriceMonitor monitor)
        {
            monitor.PriceChanged += OnPriceChanged;
        }

        public void OnPriceChanged(decimal oldPrice, decimal newPrice, string valute)
        {
            if (newPrice > oldPrice)
            {
                Program.PrintColor($"Цена повысилась: {oldPrice} -> {newPrice}", ConsoleColor.Green);
                RestorPrice(valute, newPrice);
            }
            else
            {
                Program.PrintColor($"Цена понизилась: {oldPrice} -> {newPrice}", ConsoleColor.Red);
                RestorPrice(valute, newPrice);
            }
        }

        public static  void RestorPrice(string valute, decimal value)
        {
            Program.CryptoValute[valute] = value;
        }
    }
}