BeReal is not good (most appropriate way i could say this). It is a Privacy nightmare. Just think about it, a bunch of random strangers are getting access to every single day what you and your family are doing. I know nobody is concerned about privacy anymore. Seems like we have lost that but still Also BeReal has a bunch of Ads. And since the inclusion of Ads bereal has quickly lost in popularity. If you are searching for a Alternative, you should try out DD-DigitalDiary It doesn’t have a lot of the features like social sharing. It is basically a journaling application. But still could be a good alternative. Also there was another app Minutaie which first started this trend so i suggest you should also check it out
I study this, so I agree that it does open up a bigger “attack surface” and possibility for error. However, I still do think it’s possible - if you have a defined persona, understand what you expose and to whom and yes, avoid linking this identity to others (like with IP or mail/handle/phone).