Hi

I'm curious as to what people think could really stop the whole bitcoin-"currency" now (from growing in a curreny with a market-capitalization > 30 billion USD. ATM it is at 300 million.)

-Dotcom's "mega" will support BTC
-Reddit.com will support it(or already does?)
-we've got "pure bitcoin-based" multi-million dollar businesses (silkroad, satoshiDICE, mtGox,...)

What can stop Bitcoin now?