Should I continue?
That warning really just means that the security certificate isn't perfect.
The problem being the certificate is for enumbered.com yet the website auto forwards the user to
www.enumbered.com which as far as Secure HTTP is concerned is a sub-domain of enumbered.com.
Completely safe to continue, as for putting money into enumbered, idk.
I registered for enumbered back in January 2013 and have never put any money in.
Here is the certificate details if you are interested:
The certificate details are pretty similar to bitcointalk's certificate.
The difference being bitcointalk's devs do not pointlessly forward you to
www.bitcointalk.com