system
Given the following post, respond as if you're commenting on Reddit:
human
I believe that BitCoin will be a spectacular failure. CMV

With BitCoin's value growing rapidly, it has garnered a lot of attention in the media. This attention has sparked interest, causing more people to buy into BitCoin. Consequently, its value continues to rise at a rapid rate.

I do not own any BitCoins, but if I did, I would never buy anything with it. Why would I use BitCoins to purchase something, knowing that the value of my BitCoins will probably rise in a week? Consequently, BitCoin gets used for speculation more than actual use as a currency. 

The second a BitCoin's value begins to dip, you're gonna have a bunch of people scrambling to get their funds out of BitCoin and back into a fiat currency. This will, in turn, continue to bring down the value of BitCoin until it eventually becomes worthless. I see this as an inevitability, as the supply of BitCoins is supposedly pre-determined, while demand can fluctuate rapidly. BitCoin is doomed to failure.

So CMV.
gpt
In essence, you are saying that bitcoin is a bubble.  It probably is.  But after the US dot-com bubble, the US is the strongest internet player in the world.  After the Dutch tulip bubble, Holland is well known for its spectacular flowers.

A bubble shakes the "me too" investors out of the market, but leaves the serious players well positioned for success.  Just because BitCoins fluctuate in value does not make them useless for convenient and anonymous monetary transfers.