Sometime in 2015 when it was announced that Provia 400X was going to be discontinued I made a decision to buy a 5pack every time I go to Bic Camera. At that time I shot a lot of color film and went to Bic Camera to drop off or pick up film for developing quite a bit. I think I ended up with some 30 pro packs (5 rolls). I believe the film was already discontinued outside of Japan. This was really my last chance to buy the stuff and be able to shoot it for the foreseeable future.
The crazy thing is it's 2017 now and I still have over 100 rolls left of it. Most of the stock I have either has expired already or is approaching expiry. It's all been frozen since purchase and will probably be ok to shoot even post expiration date, but for how long? It could take me years to go through all this film.
The really crazy thing is that I already had a 100 rolls of Ektar 100 in my freezer. I bought that because Kodak doubled their prices in Japan sometime in 2015. Ektar used to be the cheapest color pro film they had. I think it was 3500 yen for a five pack. (700 yen per roll) They increased it to 1350 for single rolls. So the five packs and single rolls were on sale side by side for a while. I couldn't resist buying all the Ektar I could afford when I saw them side by side with a 100% price difference.
Now I had over 200 rolls of film in my freezer already and discovered how nice of a film Kodak Gold 200 is. So I went on Yahoo auction and bought a 100 pack of that for dirt cheap. I was already used to buying film in bulk so it didn't even register how crazy of an idea this was. Well, after shooting Ektar and Gold 200 the entire summer of 2015 I really got into B&W because I loved that I can print it at home. I never bought that in bulk because I couldn't find any deals. I just ordered from B&H in batches of 10 - 15 rolls as needed.
The crazy thing is that now it's 2017 and I still have my freezer full of film. I haven't bought color film in over two years and probably won't have to for the next 3-5 years the way things are going now. The film will probably not deteriorate in quality much over that time since it's frozen. It's just crazy to buy that much film. You just don't know what you're going to be shooting. We can't predict the future, and if I could I would use it for things other than saving some money on film that's going up in price.
Buying and hoarding expired film is even worse. You don't know how the film was stored. Old film will curl a lot more than fresh film. You won't get colors as they were intended. The celluloid base of the film won't last forever either. Color film lasts for about 50 some years I believe until vinegar syndrome sets in and the acetate base will rot away. If you buy film that expired 10 years ago, you are already 10 years into those 50 years, meaning that your photos are only good for another 40 years after developing the film. There are ways to extend the life time of film by storing it in a freezer but who really does that except for Hollywood? I don't know anyone who stores their negatives in a freezer at home.
Maybe you don't care about the negatives because you can hold onto the scans. That's a valid for some people, but why not shoot digitally then and use VSCO to get the film look?
Shoot fresh film. Support the industry and enjoy the film as it was intended to.