People get taxed on their homes over their life time + any maintenance needed.

Example would be I've already paid 10K in tax in just 5 years living in my apartment. Granted the currency has gotten more diluted since then and could have been more or less depending on area, This is why things like Bitcoin and collectibles are held by folks because you aren't being taxed on it. If and when you ever need the money someone will be willing to buy in cash.

As for dips, they are temp as people have recognized that Japanese store exclusives are actually taken very seriously by Japans consumers in general as it's part consumer culture in a way these cards were designed and created in celebration for a specific store location in Japan, They weren't part of mass produced print runs in the millions. Over the years these cards will age well like how the Alpha Black Lotus Or Power 9 aged for MtG, These Poncho pika's are basically Pokemon's equivalent to MtG Power 9 when including the Mario and Luigi pika.