Apex domains cannot have CNAME records.
Question and response
Question
dig pascalbichain.com. NS
Answer
pascalbichain.com. 5 NS ns-2018.awsdns-60.co.uk.
pascalbichain.com. 5 NS ns-299.awsdns-37.com.
pascalbichain.com. 5 NS ns-609.awsdns-12.net.
pascalbichain.com. 5 NS ns-1912.awsdns-47.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0