Announcing you're pregnant before 3 months

It's crazy how many people I know have misscarried after announcing there pregnancy before the 12 week mark. It makes me wonder if it's really true that you should wait.. My theory is that the fetus is just very delicate at that beginning stage and people really under estimate the power of the mind. When you announce it there will always be that small percentage of people who will get jealous or envy you. I feel like all that bad energy affects the fetus and is what may cause a miscarriage. šŸ¤·šŸ»ā€ā™€ļø But than again I know people who have announced they're pregnancy before 12 weeks and still had a healthy pregnancy.

What do you all think? Do you personally wait or announce it before?