This exact question was asked a year or so. The answer is the same now as it was then.
Just like buying shares, only touch this if you are an experienced and successful stock-market gambler who has enough money to not mind losing it on a wrong guess about whether the future value of your investment will go up. The fact that stacks of other people have bought into it in the past is not an indication that at any given moment you will make an easy profit - particularly now that when the global economy is so fragile. Read up about the South Sea Bubble.
Scottish political mess. Is Devolution working?
