The real strat is Japanese modern sealed. English/any language sealed is either really really good OR fucking garbage. Like some sets are just awful or really boring (Steam Siege and Crimson Invasion coming to mind) but Japanese sets are usually pretty good, nevermind that they cut out some set cards as well for western promos or to never release them in the west. There are also special Japanese sets that we just don’t get in any form, so I think it really depends. If my closet looked like a target shelf of Japanese product I’d be VERY happy. If it was just a target shelf of English product I’d be throwing myself off a bridge or smth. It should also be noted that some western sets are just absolute bangers and definitely worth keeping sealed.
In 25 years there will still be hundreds of listings for hidden fates etb’s 
I agree with this 100%. in my opinion, English modern has a very high “noise to quality ratio”. while Japanese sets generally have a lower “noise to quality ratio”.
Its the reason why I told myself that aside from Pokémon center exclusive ETBs, I would just concentrate on collecting/holding Japanese sets (not to mention the card quality as well)
Bingo
Just because it worked in the past doesn’t mean it will work in the future.
Good take omwalf
And I fully get these are listed prices only. Also I fully believe that no one would be crazy enough (atm) to spend that amount on sets where PSA 10 copies of the chase cards can be got for sub €70-80.
I may list a box just as an experiment to see would I get any actually genuine interest because if interest amassed with my lowest listing what could that mean for sets that actually have better chases such as the alt art swsh era sets
Lol yeah referenced Rudy as it would have been disingenuous if I’d referenced Keynes, as I’d not heard the quote before watching his videos!
MRSP is $144 though…
And they can and have gone well below MRSP.
Screenshot taken from Dans video https://youtu.be/vyXYF8BJExQ
Base, jungle and fossil sealed boxes for $40 in 2004
i can buy 36 loose packs for fraction of the price, its just those boxes have lower prints than what we currently have because of covid
I like that noise to quality ratio. That is the best way to describe English modern!
I don’t disagree 
I sold my two booster box cases of Evolving Skies earlier this year for around $4,000. I used that money to pick up a PSA 9 “Staff” 2015 champions festival and a CGC 9 1st edition shadowless Nidoking. The rest I put back into bank rolling a few PSA submissions.
Modern sealed product “investing” has recieved an unfair amount of flack IMO. The concept itself works the majority of the time, it’s just that the usual cross section of cancerous people who partake in it lead to warping people’s views on it.
Personally, I loathe the term “investor” when it’s used in the TCG space, since its used in a derogatory context most of the time. I’ve dabbled in buying booster box cases to open/hold since mid era XY up until around Evolving Skies. Trying my best to buy only when its a good price point/time to do so. Buying several cases on release to do anything other than open, is a great way to poorly deploy your capital lol.
I know Rudy from alpha investments always talks about how his Pokémon stuff always sells regardless of the set plus he says it always goes up in price. I’m not sure about long term because of two different reasons.
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They are printing like crazy these modern sets.
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Everyone is hoarding stuff hoping it will have the same effect as wotc and ex eta stuff,
*THIS IS NOT FINANCIAL ADVICE *
Rudy heard y’all
It’s interesting reading this thread, as I see a disconnect between two groups of people.
There are those that state modern product is not a good long term investment, and others are saying it is a good investment because they have made xxx return on “evolving skies” or “insert popular set”.
I think the best way to conceptualize modern product is by the massive demand it currently experiences. Sun and Moon, even some X&Y there was very little demand for modern product.
Now, the sets are genuinely exciting and fun to open. I will share how I utilized this demand to gain relative short-term profits.
What I’ve done in Sword and Shield is each time a set is released is buy a case, 2 if I think it has incredible potential (evolving skies, brilliant stars and silver tempest), and 0 if I thought the set was uncharacteristically poor (cough cough battle styles). I also ignored any sets released through elite trainer boxes, not worth my time in general.
No specific investment plan. I made it super simple, as a predominantly generation 1 through 4 collector, if I recognized the majority of the characters in the set, I figured it was a good purchase lol.
I then waited until this week, with the release of the new Generation Scarlet and Violet.
Now, I will begin to offload the last three years of “investing”. Call it short term, call it long term, I classify it as enough time to make it worthwhile.
QUICK TANGENT:
I don’t have the same faith in modern product as I do for previous generations, however I believe certain sets have potential, even though they may be overhyped.
I saw it discussed in this thread that “people won’t buy sealed product because the cards inside provide no value”, however the proportionality of sealed product to the cards inside has always been massively skewed.
Modern examples are Flashfire at $3,500 a box when only two cards can make you even close to breaking even.
For evolving skies, the “moonbreon”is higher than the box in a PSA 10, and I believe a 9 you break even. Any alternate art currently gives you a fair amount back as well if graded appropriately. As long as that remains the case, I believe the set has potential to be opened, limiting sealed supply and therefore increasing price. However I also acknowledge the print run to evolving skies is significantly larger than flashfire, although I also believe fundamentally evolving skies is a better set.
BACK TO MAIN POINT:
Regardless, this strategy is the same one I will deploy for scarlet and violet. With a total of 12 sets in Sword and Shield, including 3 additional cases for the sets I thought I had potential and subtracting one for ignoring battle styles, I own 14 cases, or 84 booster boxes. I can tell you confidently, in just a three year period, my profit margins are worthwhile enough where I consider modern an acceptable “investment”.
Also, it’s important to note because the prices have stayed relatively affordable, people feel comfortable paying for a complete case, instead of selling all 84 booster boxes individually. It’s not as tedious as I originally expected.
CONCLUSION:
I am a small time buyer/seller based in Canada, as such the market is significantly smaller overall. This expenditure in modern allowed me to expand my collection by a sizeable amount, so therefore I consider it worthwhile, and relatively low risk. I don’t think it’s worth it to hold long term and this post may be laughed at in a few years, but I believe “investments” don’t need to be long term to be successful. It is what you consider to be worthwhile. I have used the profit to invest in various black and white era booster boxes, and one higher end worlds card. These items I don’t mind holding on my shelf as actual long-term investments, and I was able to acquire them strictly from profits derived from modern product.
In short, according to MSRP prices, it was an investment of nearly $11,000 Canadian dollars that has done greater returns than any index fund available in the same three year time span. (Thanks Covid) It was also spread out in payments every few months, making it reasonably affordable, instead of a single large “Vintage” purchase.
On a unrelated note, I have a case of Vivid Volatge available 
I APOLOGIZE FOR THE LONG REPLY, WANTED TO SHARE A DETAILED PERSPECTIVE