I missed to buy bitcoin when it dipped to $9K. Then I missed it again at $10k thinking it might go down to $9k again. And now, I am waiting for $10k but it seems that it will not go below $11k again. I must be the biggest idiot in crypto world

I missed it too. When the price before is at $10k i didn't buy because i think it might go lower, but it hit to $12k then i'm forced to buy before it's too late because i think it will go higher now, then it drops again to $11k now. I regret it so much. I think you should buy at $11k now before you regret it later that you missed it again.
That is textbook fomo! Act like that and you will lose money, not gain it. When everybody screams the ed is near...buy.