Far back in the mists of ancient time, my good lady wife decided to give herself £5000 to buy some Bitcoins.

I thought she was insane, but... she had the money and it wouldn't hurt us that much if it all went horribly wrong.

She traded back and forth for a while, gained a bit, lost a bit, gained a bit and eventually got bored with it and put her Bitcoins in cold storage, all 641 of them.

I now think she is a genius and wish I had bought £5000 worth of coins at the same time.

Bottom line: If you can afford to hold for a longish time, buy some Bitcoins. Use only money that you can afford to do without forever - it may be your children or grandchildren who take the profit.