I think Bitcoin will have a good future unlike the dollar.
The fact that Bitcoins cant be made without mining with CPU-power make it pretty safe for inflation.
People have been using Liberty Reserve for a very long time and it seems to work fine.
Bitcoins popularity have just started to grow as you can see here:
http://www.google.com/trends?q=bitcoin
I'm sure we'll see a lot more of it in the future when more people see it's advantages over other ecurrency.