I tried to open it now but I can't access the link that I manually type on my browser tab. It might that the ad was already taken down by Google.
Yes, probably. Actually, lots of google ad like this I see when I'm using mobile browser since chrome doesn't have ad blocker unlike on firefox on desktop I used.
The best thing to do is to not use a search engine. Directly type the URL into your browser, this way you eliminate the risk of this type of scam.
It might work, but I doubt newbies will do something like that since most of them are not familiar or doesn't have any idea the correct website url especially on their first attempt to search.
See after I tried typing "blockchain" in the search engine, there were 2 different but the same blockchain phishing sites pointing to the main site phishing.
If you're using a desktop browser I suggest to use uBlock Origin ad blocker to avoid this kind of ads on google.