There are all kinds of charts under http://blockchain.info/ http://blockchain.info/. I guess it would be possible deduce a trade that occurred at a price that p

There are all kinds of charts under http://blockchain.info/ http://blockchain.info/. I guess it would be possible deduce a trade that occurred at a price that put the value over $1B but that depends on your exact definition. Also the valuation might go over and under $1B multiple times in the future.