Balance it out.
Depending on the goal, and the timing:
- Keep some goals to yourself/share with God,
- Share some goals with people close to you, who are positive and supportive,
and as you get closer to achieving your goal, - Expand the circle of people with which you share it, to acquainances and strangers.
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I would not recommend sharing all your goals with everyone right away, because often you need some time with your own thoughts and planning and intentions, to feel out what path to take.
When you are ready to share and feel internally more certain of achieving it- I also notice the following effect- when I initate certain goals, or get closer to achieving goals, often having the support and expectation of people around me acts as a kind of energizer which multiplies the intention energy for that goal or event- as those people are also sending out their expectation and intention to the universe.
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Also btw, it is possible that those lottery winners 'knew' on some level that they were going to win, so felt compelled to share that with others.