You have asked this before, henry. Unless you fully understand it I would stay well clear. I haven't tried it as to me it looks like a bubble that will burst, although I can see that the same could have beens aid about gold. Some people have done well out of it but others have had their fingers burned. Remember, what youa re buying for say £1000 in the hope of making a profit, someone else bought it for maybe only £500 and someone befor ethat paid only £100. Can it really keep rising? It's a risk