Government controls currency by enacting different monetary policies. The point of these different monetary policy is to allow the Fed to control the economy, and in particular output and inflation, through the interest rate. With bitcoin the government  cannot touch the supply or even tax it. So they fear a whole economy could be created without them having a say or getting tax from it .

last time i check bitstamp it was 50 xrp for 1 usd

welcome

http://www.coindesk.com/what-other-digital-currencies-are-there/
check it out ,quick summary

hey

mtgox.com dwolla
coinbase.com trade btc to usd
 both require you verified identity tho

can't they just ban certain exchange websites, like they did when they stop internet gambling sites

ripple

still allot of work compared to other forums

Thanks for the info , still new to this stuff.

Can it get to big without the government consent ? Wouldn't the government just block bitcoin exchange sites if it doesn't like what it sees?

gratz

Is this offer still valid 
would like to try it out