What he said.... the people who should be concerned aren't the peeps who buy some bitcoin to send to a source... if you have lots of bitcoin sitting around and your actually making money off of your investmentire then yes you should report it and if you dont, there's a chance the is is gonna want to know why.... in the amount of time I've been using bitcoin, I've probably owned it a total of 11 minutes.... I buy it and send it ...
What if you just left in your currency wallet instead of your BTC wallet. it doesn't fluctuate then. more for the guys buying and selling as opposed to using it an investment