Having no heirs doesn’t absolve you from the need for proper estate planning.
The most avoidable problem is what happens to your wealth if you die without making a will (or dying intestate). When this happens, the state court system decides how to handle your money and belongings.
Therefore, whether you have no heirs or a hundred, the most important element of estate planning remains unchanged: Make a plan. Even a flawed plan is better than none, so consider tackling this task as soon as possible.