1 bitcoin is now worth approximately $1000 (depending on market fluctuations though)
Perhaps 1 bitcoin might be worth $100,000 soon? Or maybe $1,000,000
So, just having 1 bitcoin, is like having a lottery ticket to perhaps 'win' $100,000 or $1,000,000
Claiming things like that here is like asking if Jesus was real in a Christian forum
But to be serious, I think that it is more of an lottery then an investment. It seems like small groups have hoarded most of bitcoins in existence and are creating artificial deficit to drive the price up. It is unpredictable how high they plan to go before they begin their dumping procedures, but I'm pretty sure that they have a plan with an exact number. So bitcoin could go 30 000$ per coin or the maximum could be 2000$ per coin. Impossible to predict the plans of smaller groups in control, with trends or common sense.
And as an investment, I think that buying BTC is generally foolish. Not foolish in a way that it is impossible to earn with it, because it is possible. But in a way where the investments actually go - into mining. The arms race for mining is just stupid and investing by buying BTC just fuels this stupidity. It's stupid because with increased network power, the security or any other practical aspect doesn't improve much. It doesn't protect the network from an 51% because all the network is pooled together into single points that could be compromised anyway. If you could compromise BTCguild and GHash.io, then you can coordinate an 51% attack without any difference how powerful these networks are. The increasing network power would only make sense if it would speed up transaction times and wouldn't be pooled together into points that could be compromised. People only invest into mining to earn BTC, but mining has very little positive effect to the progression of the entire bitcoin system.
Investments should go into support services that offer new payment options and practical usability for bitcoin. Without practical usability, then bitcoin is just a new innovative gambling platform where people get their kicks on trying to buy low and sell high.