Richard Branson once said:
Business opportunities are like buses, there’s always another one coming.
How many ideas can you have in a day? a week? a month?
How many of these ideas are yours and yours alone?
Ideas, good or bad, are common. There will always be someone, somewhere who stumbles upon a similar idea. Google didn’t steal your idea; you can’t own an idea. You can own a solution, a product, a story, code, etc but ideas are worth a big $0.
There’s always new ideas as long as you’re open to seeing them. Being too protective of your ideas will merely make you blind and unhappy. Focus on what’s concrete, you’ll get a lot by sharing your ideas.