Bluehole doesn't have plans to increase PUBG's price after it leaves Early Access.

PlayerUnknown’s Battlegrounds is a global phenomenon on the PC platform selling 10 million copies in just five months. The popularity of battle-royale genre has grown a lot since PUBG released with the latest GTA V’s Online update brought a similar idea of PUBG into a mode called Motor Wars, “Blending the adrenaline rush of Drop Zone with the claustrophobic tension of a match of Penned In, this brutal Adversary Mode is a deadly scavenger hunt where second place is not an option (…) Up to four teams parachute into a periodically shrinking kill box strewn with a lethal assortment of guns, explosives and Weaponized Vehicles. Work together, find a vehicle, and fight opposing teams and the shrinking map to survive and win.”
In an interview with GamesIndustry, Brendan Greene – PUBG creator – explained the studio wants to keep the same price tag, $29.99, for now – “We don’t have a plan to increase at the moment.” Brendan said, ” That could change, but from my understanding, and from what we’ve talked about internally, we want to keep the same price (…) $30 is a good price for what you’re getting, and this is a game that could last for five or ten years. You’re buying into something bigger than just a year-long game.”
https://www.youtube.com/watch?v=m0Tnp-3W3z4
The game is scheduled to release later this year on Xbox One as an exclusive launch game, and you can purchase a copy on Steam right now to experience the blown-out battle-royale game.