LOL- nice attitude for a DISCUSSION forum. FYI: There are plenty of people that don't understand these simple concepts...
Again - whatever logic/justification floats your boat. Define "investment" however you like in regard to resale value or anything else you like. If you consider your purchase of DVC as far as resale purposes, I cannot imagine why anyone would buy DVC or any timeshare in the first place.
Stop it already - will you? This is getting really ridiculous. We can all make endless analogies explaining present and future values - most people have been through basic accounting and finance - we don't need the lecture yet again here (there are already quite a few) and that is not the issue. The issue is simply that neither you, nor anyone else has any idea what a night at Disney will cost in 35 years. Simple as that. What if we see inflation rates in excess of 10% for a few years, or going to the extreme the US dollar is devalued and that Dodge Viper costs $300,000 in 2042 in present day dollars? Then that $15,000 you paid today seems to be quite a bargain - doesn't it? That's the only point we need to make - nobody knows what a night will cost in 35 years. Shall we go back 35 years and see what nights at Disney were going for then and apply the same rate increase looking 35 years into the future?
Spare me the lectures and examples of investing in the stock market, your favorite low-cost index mutual fund, a CD, a car, or anything else - it has absolutely no applicability here.
Oh yeah - we've also prepaid for our daughter's college tuition - all 4 years of it. She won't be attending college for another 8 years, but it is all paid for - GUARANTEED. Now, we get mail every week (as I'm sure many do) from some broker or mutual fund company expounding the benefits of saving through a 529 college savings plan in some mutual fund and how with historical market returns we'd have so much money in so many years. Funny, but not one of them will guarantee that if I give them the full amount that we've prepaid to guaranteee tuition coverage in the prepaid plan, in 8 years that it will grow to be enough money to cover then current tuition rates - or better yet even guarantee that it will not drop in value. Why in the world would I do that if I can pay a lump sum today and guarantee that all 4 years of tuition are entirely covered? That is the analogy that applies here.

