Cryptocurrency Price Alerts

import requests
import json
import pprint
import time
from dhooks import Webhook, Embed
import math

def round_nearest_to(x, a):
    return round(round(x / a) * a, -int(math.floor(math.log10(a))))

alertlogo = 'https://cdn.corporatefinanceinstitute.com/assets/stock-market-crash.jpeg'

url = 'https://pro-api.coinmarketcap.com/v2/cryptocurrency/quotes/latest'

parameters = {
        "slug": "bitcoin",
        "convert": "USD"
    }

headers = {
        'Accepts':'application/json',
        'X-CMC_PRO_API_KEY':''
    }

hook = Webhook('')
    
btclogo = 'https://1000logos.net/wp-content/uploads/2018/04/Color-Bitcoin-Logo.jpg'

while True:
    responsecontent = requests.get(url, params= parameters, headers= headers)
    pprint.pprint(json.loads(responsecontent.text))
    price = (json.loads(responsecontent.text)['data']['1']['quote']['USD']['price'])
    marketcap = (json.loads(responsecontent.text)['data']['1']['quote']['USD']['market_cap'])
    percentchange24hr = (json.loads(responsecontent.text)['data']['1']['quote']['USD']['percent_change_24h'])

    price = round_nearest_to(price, 0.01)
    marketcap = round_nearest_to(marketcap, 0.1)
    percentchange24hr = round_nearest_to(percentchange24hr, 0.001)

    if percentchange24hr < -7:
            alertembed = Embed( 
                description= (f'The current price of Bitcoin (BTC) is: **${price}**. This dip may be the beginning of a crash. Use this oppurtunity to sell or buy!'),
                color= 0x5CDBF0,
                timestamp= 'now'
            )
            alertembed.set_author(name= 'BTC Emergency Alert')
            alertembed.set_thumbnail(alertlogo) 
            alertembed.set_footer(text='CoinMarketCap', icon_url = 'https://i.imgur.com/RCdZEvS.png')
            alertembed.add_field(name= 'Market Capitalization:', value= ('$' + str(marketcap)))
            alertembed.add_field(name= '% Change 24hr', value= str(percentchange24hr) + '%')

            hook.send(embed=alertembed)
            time.sleep(1800)
            break
    
    embed = Embed( 
        description= (f'The current price of Bitcoin (BTC) is: **${price}**'),
        color= 0x5CDBF0,
        timestamp= 'now'
        )

    embed.set_author(name= 'BTC Price')
    embed.set_thumbnail(btclogo)
    embed.set_footer(text='CoinMarketCap', icon_url = 'https://i.imgur.com/RCdZEvS.png')
    embed.add_field(name= 'Market Capitalization:', value= ('$' + str(marketcap)))
    embed.add_field(name= '% Change 24hr', value= str(percentchange24hr) + '%')

    hook.send(embed=embed)
    time.sleep(1800)