Не могу остановить цикл. Библиотека telebot.

[why)]

Пишу бота для отслеживания курса доллара в тг. Есть встроенный keyboard:
При нажатии Track dollar начинается цикл, а при Track off должен остановиться.
код:

@bot.message_handler(content_types = ['text'])

def currency(message):
    
    #parsing goolge
    full_page = requests.get(url, headers = headers)
    soup = BeautifulSoup(full_page.content, 'html.parser')
    convert = soup.findAll('span', {'class': 'DFlfde', 'class': 'SwHCTb', 'data-precision': 2})
    currency = convert[0].text
    #send_message
    if message.chat.type == 'private':
        if message.text == '? Rate dollar ?':
            
            bot.send_message(message.chat.id,'? Dollar now: ' + str(currency) + ' ₽ ?')
        while message.text == '? Track dollar ?':
            
            price = str(73.4)
            differnce = str(0.1)
    
            full_page = requests.get(url, headers = headers)
            soup = BeautifulSoup(full_page.content, 'html.parser')
            convert = soup.findAll('span', {'class': 'DFlfde', 'class': 'SwHCTb', 'data-precision': 2})
            currency = convert[0].text   

    
            
    
            if currency >= price + differnce:
                bot.send_message(message.chat.id, '? Course increased: ' + str(currency)+' ?')
            
            elif currency <= price - differnce:
                bot.send_message(message.chat.id, '〽️ Course lowered: ' + str(currency)+' ?')
            
            elif message.text == '❗️ Track off ?❗️':
                break
            time.sleep(2)

пробовал и так:

@bot.message_handler(content_types = ['text'])

def currency(message):
 
  #parsing goolge
  full_page = requests.get(url, headers = headers)
  soup = BeautifulSoup(full_page.content, 'html.parser')
  convert = soup.findAll('span', {'class': 'DFlfde', 'class': 'SwHCTb', 'data-precision': 2})
  currency = convert[0].text
  #send_message
  if message.chat.type == 'private':
    if message.text == ' Rate dollar ':
      
      bot.send_message(message.chat.id,' Dollar now: ' + str(currency) + ' ₽ ')
    
    elif message.text == ' Track dollar ':
      stop = '❗️ Track off ❗️'
      
      while True:   
        if message.text == stop:
          break


        price = str(73.4)
        differnce = str(0.1)
        
        full_page = requests.get(url, headers = headers)
        soup = BeautifulSoup(full_page.content, 'html.parser')
        convert = soup.findAll('span', {'class': 'DFlfde', 'class': 'SwHCTb', 'data-precision': 2})
        currency = convert[0].text   
        time.sleep(2)
        
        if currency >= price + differnce:
          bot.send_message(message.chat.id, ' Course increased: ' + str(currency)+' ')
          
        elif currency <= price - differnce:
          bot.send_message(message.chat.id, '〽️ Course lowered: ' + str(currency)+' ')