This can also be a con as you can also lose a large amount within seconds if not properly secured.
You mean PayCon[CON]? Yes, this one is the future of digital currencies!
On a serious note gold is material. Useful and precious material. Not money. It's not even a fair comparison. It can not be worthless until we will be able to synthesize it and use for manufacturing. Bitcoin, in the mean time, can easily fall to near zero value if something goes really wrong..