Depending on the numbers, this might make sense for you. As with all other things, the IRS takes the position that long-term capital gains rates, currently at a maximum of 15% of your profits, are only for investors. Flippers are not usually investors. But, if you do one or two flips every year, you might qualify. As with all the other IRS rules that have no firm guidelines, it depends on the circumstances. Ask a tax professional for advice.
Sometimes, it does not make economic sense to drag out a sale, even if you do get cheaper tax rates. You should first determine how much you will save in taxes. Then, you should compare that number to how much your additional interest, real estate taxes, insurance, lawn care, and utilities will cost you if you hold the property and wait to sell it. Then, judge if it makes economic sense to delay a sale or not. Also ask yourself, if you have a buyer today, if you want to risk him or her disappearing later.