In 6.0 Blizzard are removing valor and justice points. Like usual they are giving players gold for points they did have. To convert timeless coins into gold you first need to have at least 3,000 coins because 3,000 coins gets you 100 valor so if you don't feel like farming valor anymore you can just convert your coins into valor to get the gold from it when Blizzard removes it. Additionally if you have multiple characters on the same server once you valor cap your first toon your other ones will get 50% additional valor so it would be 150 valor for 3,000 coins.