stinkypete said:So for 378 usd i get one bitcoin ?
Correct; you can check prices here http://coinmarketcap.com/
yennus mentioned a couple good places to trade, I also like https://buyabitcoin.com.au/ and https://sellabitcoin.com.au/ I used them recently to buy and sell and was very simple and is quoted in Australian Dollars
Also getting back to your original question if I had to choose a 'company' I would probably pick ASX:NCM Newcrest Mining