stopping while true loop in discord.py with command

Question

Im making a simple crash gamble command in discord bot, but i don't know, when i use !crash money, how to stop it with !stop. I have a while True loop and i want to make somehow break the while true loop with the command !stop, i have no idea, how to make the command.

simplified code

@client.command()
async def crash(ctx, amount = None):
 multiplier = 1
 while True:
  multiplier += 0.2
  #here i would like something, when author of the crash command will write !stop, it will break the while true loop 
 win_amount = int(multiplier*amount)