I am just like you, I have sold my bitcoin and finally I now regret seeing the very high price of bitcoin. want to buy again it is too late, maybe i am waiting for bitcoin price to drop to $ 20k, when the price drops to $ 20k i will buy as much as i can. maybe a lot of people who become millionaires because of the crazy price of bitcoin.
You're not the only one who sold their BTCs. And surely, you're not the only one with regrets. But you cannot blame yourself. Sometimes, the price is just unpredictable and you just can't really know when will it hit the highest or when it will crash. So the tendency is you sell whenever you feel the time is right. But, there's always a next time where you can earn again and then sell at a better time. As long as you gained, you still have something to be grateful for.