I think earlier a lot of people started investing in bitcoin by mining. Currently, usually you have to be complete fool or very bad in math to purchase mining equipment. So, I guess, now if you want to invest in bitcoin, you have only one way...by buying.
Ugh...
This is *not* always the case, and I find it's usually the ones that are bad at math who make blanket assumptions like this.
Buying a miner is the
only way you stand a chance at profiting even if the price of BTC goes down pending that you're not shorting BTC (which is not the same as buying BTC anyway).
It's not guaranteed, but at least it's not the same 0% probability of profiting -- or, conversely, the 100% probability of losing money -- if you buy BTC and then it tanks.
Furthermore, if mining conditions are favorable but the average price of BTC remains stable for a relatively long period of time, you will ROI with your miners before you ever see a profit from buying BTC, even if BTC goes up in the future. This is exactly what happened with my Antminers. If I had bought BTC instead of my Antminers, I'd still almost be at break-even. Instead, they've ROI'd almost twice over now.
Edit: ROI is now a verb :\