Don't know shit about Bitcoins, but involved in selling gold. It has shown consistent growth over the years and it was good to see its value recently take over platinum and rhodium, but it's a concern that it had its highest value day back on the 6th of September and it hasn't been able to catch up. It's looking good at the moment, but can see it going tits up again later in the year. Wouldn't be too reliant on it as an investment opportunity atm.
Gold and silver are not really investments in the sense of making profit. They are hedges against inflation at best. I do hold a small amount of each just for said hedge.
However as far as commodity trading goes for a decent return I invest in oil binaries. With all the talk about Israel possibly taking out Iran, oil will be the one to be in.