Unlike now, more people will get used to handling digital coins when govs introduce, encourage CBDCs. More people will understand  BTC and better grasp its advantages over CBDCs. Significantly more people will buy BTC and it will get much more valuable than today. Some people will prefer the regulated, less volatile but possibly inflationary CBDCs with the advantage of insurance provided by banks Nevertheless, millions more people will adopt BTC after widespread use of CBDCs. Overall it will not affect BTC negatively but significantly positively.