If millennials are looking to connect to the good-old-days, there's no denying that stamps are pieces of the past that you can touch with your hands. More to the point, as both The Guardian and PureWow, have documented, stamps are also Instagram and TikTok phenomenons. They are, after all, colorful, image-oriented, unique, and now, suddenly, hip. 

Then there's the fact that stamp collecting is not something you do alone. It's an international movement. There are forums, societies, Facebook groups, and Instagram pages filled with exciting discussions, avid debates, and impassioned advice. The American Philatelic Society, for example, has members in over 110 countries. Finally, stamp-collecting isn't just a fad; there's really something to it. At least Queen Elizabeth II, Freddy Mercury, and John Lennon thought so, well before the hobby made it big on social media (via Born2Invest). 

Have we convinced you to try it? Maybe you'd also be interested in trying other old-timey hobbies. Bridge, homemade jam making, weaving on the loom, water aerobics, woodworking, and banjo-playing are all itching for comebacks.