Are Vintage Pokémon Cards a Bubble Built on Nostalgia?

Yes, there are genuine bubble characteristics in the vintage Pokémon card market, but the situation is more complex than pure nostalgia-driven speculation.
Japanese Pokemon TCG cards and pricing

Yes, there are genuine bubble characteristics in the vintage Pokémon card market, but the situation is more complex than pure nostalgia-driven speculation.

Base Set Pokémon cards are unlikely to lose significant value in the future, and historical price data supports this outlook.

Pokémon Base Set cards are not valuable solely because of Millennial nostalgia, though nostalgia certainly plays a meaningful role in the market.

Pokémon cards are unlikely to completely crash when millennials stop collecting, but the market will almost certainly contract and stabilize at a lower...

Yes, Pokémon cards will almost certainly remain valuable after millennials age out of the hobby, but the nature of that value will shift.

Pokémon Base Set cards will not necessarily lose value when millennials age out, but their price trajectory could shift significantly depending on how new...

The short answer is that a significant percentage of HGA 9-graded Trophy Kyurem cards do downgrade to Beckett 2s when crossed, though exact figures are...

Squirtle Stamp Gengar cards experience higher grade improvements after regrading in roughly 15-25% of cases, though this varies significantly based on the...

There is no publicly available data documenting how often Rainbow Rare Flareon cards specifically receive higher grades after regrading.

The short answer is that "TAG 2 Raichu card migration" is not a documented or recognized phenomenon within the Pokémon Trading Card Game collecting...