Given the stellar performance of Harley-Davidson (NYSE: HOG) - the stock is up a whopping 300% over the past five years, 40% in the last year alone - you'd think the iconic motorcycle maker is firing on all cylinders.
But just as a motorcycle can be going 90 miles per hour right before it runs out of gas, Harley-Davidson stock looks like it doesn't have much farther to go.
After more than 30 years in the markets, I've seen all kinds of new technologies that are supposed to change the world. Most are pumped by little-known companies with overly hyped marketing, aggressive underwriters, and little more than vaporware. To say I'm jaded would be an understatement.
But I ran across something recently that positively made my mouth drop.
We already know about 3D printing. It's all the rage right now, because you can buy a printer for a few thousand bucks and cook up whatever your computer can plot.
But 4D printing?
I don't know whether to be terrified or excited as all hell about this.
