It's also important to note that once you turn 65, you can use the money in an HSA for any reason, not just healthcare. For this reason, an HSA can also be a valuable component of your retirement savings strategy.
The IRS will treat any non-healthcare withdrawals as taxable income, so it's still preferable to use the money for healthcare costs. However, if you have more in your HSA at the time of retirement than you'll need for healthcare, it's beneficial that it can essentially serve as a retirement plan.
As an additional note, you don't have to use the money in your HSA to pay for healthcare expenses as they arise. For example, if you have a $500 emergency room bill and the cash to cover it, it can be a smart idea to leave the money in the HSA to grow and compound for the future.
Should I open an HSA?
The short answer is yes, if you can.
If you qualify to contribute to an HSA, there's little justification for not taking advantage of it. Opening an HSA is a relatively quick and easy process, even if you do it on your own. As we've seen, these accounts offer benefits that even the best tax-advantaged retirement accounts cannot match.