Okay, I'll give a different perspective. That may ruffle some feathers and I'm sorry because I do hate to do that. Indeed, the views stated already are very popular on this site and I know my opinion is in the minority. This is what I believe though, and I want to get the other side out there.
Don't stockpile tobacco. If tobacco is going to become ulta-expensive or be outlawed, you will have ample time to react. I'm 48 and I too have been very frustrated by what has happened to several of my freedoms. However, when I compare my lifestyle to that of any of my ancestors, I'm way ahead. My Dad didn't get more than a week of vacation until I was in my teens and we sure as heck didn't fly anywhere. We had one car. For my grandfather, pipe smoking wasn't one of his luxeries, it was his only luxery. I could go on, but you get the idea. For the most part, we live pretty good lifestyles, even if they aren't quite as great as they were before the economies tanked. Give up your iphone, or satellite TV, or trip to Disney and you will have plenty of money for tobacco...and more time to smoke it. Prices are up, but honestly, $10 a tin is not so bad.
Everyone seems to be pissed off or afraid of something these days. Taxes, terrorism, communism, nuclear war, global warming, etc. For me, That is simply not a fun way to live. Stockpiling tobacco will not make anything better. Yeah, the world comes to an end and you will have tons of tobacco to trade. Sorry, but if we reach that state, all of your tobacco for trading will provide little comfort in the scope of life. Also, chances are that ten years from now, people are going to expect to sell all of their spare aged tobacco for a profit, but nobody will want it because they will be trying to get rid of their own spare tobacco. It'll be like trying to sell beanie babies. Nobody will need to buy tobacco for years, so farmers will stop growing it for a while and maybe after they grow something else long enough, they'll decide tobacco isn't worth growing anymore. Then tobacco will really be hard to get.
If you become another stockpiler, you'll just add to the hysteria/paranoia going on. The stockpilers are the reason you can't just go to a store and buy a tin of FVF or Penzance. They are the reason SP sold 4500 tins of Dunhill in a few days. Is life better like that? Fearing the sky falling every day and buying more tobacco than you can smoke in 5 years? Preventing other brothers of briar from smoking a tin of their favorite blend at a fair price? I say no! Laws and taxes aren't the biggest threat to the supply of my favorite tobaccos. Cellar kings are. Seriously.
So...relax. That's what pipe smoking is for. Put a few of your favorite tins away in case the stockpilers decide to go after it. Enjoy your pipe smoking.