It's very difficult to buy back after selling. If you sell now, you'll see the price rise slightly in a few days. When you decide to buy, the price will start to fall again, and as a result, you'll be the one losing money.
If you're considering selling now, I recommend not monitoring the price of Bitcoin for too long. You'll find that it rises after you sell, and you won't make a profit.
You can buy it back again in a few months, or even a year or two, and you could make a substantial profit doing so