For many riders, fat tires that run at low pressure eliminate the need for extra suspension. If you plan to ride in arctic temperatures, keeping your bike as simple as possible will enhance your riding experience. Fat bike-specific suspension forks are designed to work in cold temps.
If you plan to ride your fat bike with mountain bike wheels, a front suspension will make riding easier on your arms, shoulders, and back. A suspension fork can be added aftermarket to most fat bikes.
If you’re riding in technical terrain, you might also consider buying a fat bike with a dropper post or adding a dropper to your new or existing fat bike. A dropper lowers your center of gravity and lets you move the bike underneath you when the riding gets steep or spicy. It also lets you change your position in any terrain.