I don't think so. I think stamp collecting, as a popular hobby, is dying.
It's been shown that the value of collectibles is strongly correlated to the memories they bring to the collectors.
For instance, Hummel figurines were bought by servicemen at German curio shops as they returned from WWII. Their value peaked in the late 1980s but then began a precipitous decline as the WWII generation began to die off and was not replaced by new Hummel admirers. The children of WWII vets, after all, don't think of Hummels in the same way. $2,000 dolls now sell for $500, and the bottom may not yet be in.
For a variety of reasons, not many people care about postage stamps anymore. I think it mostly has to do with the way that the USPS began to mass produce new stamps, particularly the annoying peel-off stamps - making it harder for collectors to acquire full sets and to put them into albums.
I don't think people write letters the way they used to, either. Nobody communicates that way. They phone or send e-mails. Way back, getting a letter was a big deal and the more meaningful ones would be saved. Who'd do that anymore? Saved letters were a good source for stamps . . . which precipitated into stamp collecting.
That's my theory anyway, and I'm sticking to it.
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