Bitcoin seems to be the first currency in history that offers both privacy and portability across police state borders. When people realize its true potential they covet it. (Notice the bloke above who is divesting gold and silver to own bitcoin.) This appears to be a real phenomenon. And it's just getting started.
Unfortunately, bitcoin will probably suffer the same fate as gold, silver, (and goldmoney), and that is that the commodity itself is so precious that it is hoarded instead of traded. Why get rid of bitcoins (or gold, silver) when one can part with funny colored paper whose value is yanked around by crooks? (real money crowds out bad)
Real money crowds out bad (Gresham law) ONLY IF there is a fixed exchange rate between the two. If they are feely allowed to float Gresham law does not apply. This is why you can still buy gold.
Gold and silver did not stopped being used as money because people hoarded them and disappeared from day to day use. Governments regulated to impose their currency, removing any competition.