Despite the sudden drop, we're not too worried about this card, largely because the price has been stable ever since, and its initial high price may have been due to factors hard to predict early in a launch window, such as high supply or meta viability
It takes a while to accumulate 100 counters to find your best artifact
Toph does allow you to put the counters on artifacts, which then makes them come back from the dead, but her end step trigger already does this
The goal of a Go-Shintai deck will often be to protect itself in the early game, find as many shrines as possible, stack their effects, and use a large game-swinging effect to lock out the competition
Some people are willing to pay for a cardboard Pikachu or Charizard rather than an entire house