The Forbes author is a idiot.
An example, Bob starts with 1 bitcoin and makes a million day trades in 2013. Bob is a bitcoin stud and turns 1 bitcoin into 1,000 bitcoins. Bob earned 999 bitcoins or $999,000 dollars (assuming each bitcoin is worth $1,000 dollars). Bob owes $381.314 dollars in federal income taxes, not including state and local taxes. Thus, Bob needs to cash out enough bitcoins (about 381 bitcoins) to pay his taxes.
According to the idiot bob needs $381,000USD worth of
BTC to pay $381.314 in taxes.
Either the author used a period where he intended a comma or his math is awful.
This author clearly is a inept fool and should not be taken seriously.
Yeah those are kind of important details when dealing with things, such as, money...