Trying To Create Arguments

crypto-info.py

#!/usr/bin/python
import argparse, urllib, json
__author__ = 'Ben P. Dorsi-Todaro'

print "What Currency Are You Using? "
currency = raw_input(" Type list for currencies ")
#I would like to make list an argument so when the user types crypto-info.py -l or --list a list shows up
if currency == "list":
	print "List of all crypto currencies symbols. "
	print "btc = Bitcoin"
	print "ltc = Litecoin"
elif currency == "btc":
	print "You picked Bitcoin"
	btcCheck = raw_input("What do you want to know about Bitcoin? ")
	if btcCheck == "price":
		url = "https://api.coinmarketcap.com/v1/ticker/bitcoin/"
		response = urllib.urlopen(url)
		data = json.loads(response.read())
		for item in data:
			name = item.get("0")
			btcPrice = item.get("price_usd")
		print "The current price of Bitcoin is $" + btcPrice
elif currency == "ltc":
	print "You Said Litecoin"
	btcCheck = raw_input("What do you want to know about Litecoin? ")
	if btcCheck == "price":
		url = "https://api.coinmarketcap.com/v1/ticker/litecoin/"
		response = urllib.urlopen(url)
		data = json.loads(response.read())
		for item in data:
			name = item.get("0")
			ltcPrice = item.get("price_usd")
		print "The current price of Litecoin is $" + ltcPrice