As of Feb 6, 2017 the answer would.05 bitcoin. You can start trading bitcoin by opening an account on CoinBase or any other exchange platform. 2, learn about Bitcoin mining. You may see a good rate of return for a few months, but then it will drop to nothing. Bitcoin are not regulated bitcoin ghs or controlled by a central authority like the Federal Reserve and all Bitcoin transactions take place in an online marketplace, where users are anonymous and untraceable for the most part. The Invoice Expired If this happened before you sent a transaction, do not worry and start over with your order. To pay a Bitcoin invoice, you will need a working Bitcoin wallet and some bitcoins to make the purchase. Can you work out the best way to identify your trades to optimize your taxes?