The deck having so much disruption, being able to win on turn one and mostly being a one-card combo means that it can beat most decks by being faster or able to grind through multiple disruption spells
As always, the Power Nine demand a premium at auction, and Time Walk is no different
Unequivocally beaten in March of the Machine, we likely wont be seeing these iconic villains for a long time yet
Combine this with an inflated interested in collectible TCGs' rarest targets spurred by the pandemic and, while nowhere near its peak, maintaining a fair bit of popularity on streams and YouTube
A two-point bump in Power gets it to the two-hit threshold, which is not nothing, and the fact it can protect itself with Treasures or Clues or Rocks or whatever other permanents you can rustle up is super solid
That could change in the future