Try with TLS Requests:

pip install wrapper-tls-requests

Unlocking Cloudflare Bot Fight Mode

import tls_requests
r = tls_requests.get('https://www.coingecko.com/')
print(r)
<Response [200]>

Github repo: https://github.com/thewebscraping/tls-requests

Read the documentation: thewebscraping.github.io/tls-requests/