The hobby is arguing about a bubble again: that nothing made since 2021 is really rare, that a wave of supply is coming, that modern is a junk-wax era waiting to happen. It's a fair worry. But it's also a testable one, because we don't have to guess what happens when a Pokémon bubble bursts. The last one already burst, so I measured what came back.

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The method first, because it's the reason you can trust the answer. I used PSA 10 sold-price history from PriceCharting: actual completed sales, one specific grade, English only, each printing tracked separately (normal, reverse-holo and 1st-edition versions never blended into each other). No Cardmarket "Price Trend," which averages every language and condition into one figure that describes nothing real. Included: every card whose PSA 10 averaged at least $25 across all of 2021, the cards that actually mattered at the top. I used the full-year 2021 average on purpose, not the all-time high, so I'm not committing the circular error of "cards that peaked in 2021 are below their peak." 10,639 cards, 10,555 of them with a current 2026 price. Recovered = current PSA 10 price at or above its 2021 average.

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69.2% recovered, 30.8% still underwater. Then I sorted recovered-vs-underwater by one variable at a time to see which trait actually separated survivors from stuck.

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Candidate 1, rarity. Hold rarity constant and look inside each tier. Same label, opposite outcome:

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Pre-boom vs boom-era recovery, by rarity:

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Rare Holo: 87% vs 37%  

Rare Ultra: 89% vs 35%  

Rare Rainbow: 96% vs 21%  

Rare Secret: 71% vs 2%

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A Rare Ultra recovered 89% or 35% depending on something that has nothing to do with the word "Ultra." Rarity isn't the driver.

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Candidate 2, price. Raise the floor and re-check:

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\- At $25 raw: 73% pre-boom vs 31% boom-era

\- At $50: 77% vs 25%

\- At $100: 79% vs 27%

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The gap holds firm. Honest note: above $250 the boom-era sample shrinks to 32 cards and the gap narrows, but at 32 cards that's noise, not a reversal. Through the dense range, price is ruled out.

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Candidate 3, popularity. This one is partly right. Split by perennial chase Pokémon (Charizard, Pikachu, the Eeveelutions, Rayquaza, Mewtwo, Lugia, Gengar and a few others) vs everything else: a chase boom-era card recovered 75% of the time vs 28% for an ordinary one. Popularity clearly helps. (That boom-era chase cell is 63 cards: directional, not gospel. But the same direction shows in the much larger pre-boom row, which is why I trust the pattern.) So "which Pokémon" isn't ruled out. It's the second half of the answer.

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The variable that survived: print era, the set release year.

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Recovery by print era, with sample size:

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Vintage (1999 to 2010): 77%, n=5,446  

Middle era (2011 to 2016): 73%, n=2,711  

Late pre-boom (2017 to 2019): 59%, n=1,525  

Boom-era (2020 to 2021): 31%, n=957

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Year by year: 2017 was 53%, 2018 was 60%, 2019 was 62%, then 2020 was 24% and 2021 was 36%. Even the newest pre-boom sets (Sun & Moon) recovered 59%, nearly double the boom era. And I ran all four variables jointly in one model: print era stayed by far the strongest signal (a boom-era card had less than one-eighth the recovery odds of a pre-boom card, holding price, rarity and popularity constant), while price on its own carried no independent power once era was in. One-at-a-time and all-at-once agree.

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The reading: a card recovered if its demand existed before the bubble. Either the card predates the boom (it found its real level by 2019, so the mania was a spike on top of a floor that was still there afterward), or the Pokémon is a permanent chase (its demand predates all booms). The cards that stayed dead had neither, new card plus ordinary subject, demand manufactured inside the mania and gone with it. That boom-era-plus-ordinary group recovered 28%, which is almost exactly the hobby's own "nothing since 2021 is really rare" thesis, measured.

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Observationally, characterizing what the last burst did, not predicting the next one: when a Pokémon bubble corrects, the cards that historically clawed back shared one trait, demand that existed before the hype. The cards that didn't were the ones the hype created. Not rarity, not grade, not price.

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Happy to get into the method or any specific card in the comments. And if you want to find the best Pokémon cards to invest in, the site weighs release era alongside grade, rarity and real sold prices on any card, free: tcginvest.io

Worried we're in another Pokémon bubble? I checked what recovered from the last one. I took 10,639 valuable-2021 PSA 10s and the factor that decided recovery wasn't rarity, price, or hype.