By the way, is it quite useful to share our wins or betting strategy?
In my side, it is not really useful. I personally prefer to not sharing anything related to my gambling activities.
It depends on where you share your wins. If you share your bet result on casino chat, there is a possibility you will get a DM from beggars who will ask for a tip. This happened to me dozens of times. They congratulate me if they see I won something big and send me private messages asking for tips or rain. If you share them on social media, people likely to congratulate you and ask what strategies are you using.
If you do the same thing on a forum, I think there is a greater chance people will congratulate you and discuss it. If you are doing a risky bet, they would suggest you be careful, etc, etc. So it actually depends on where you are sharing this and with whom.