Do you realise that "spending" the coins is a taxable event?
No. If you don't convert, you don't need to pay anything at least not in Europe.
Or are you just counting on they never figuring it out you did?
Good luck with that one.
but, again, usually you do know what USD/EUR value you sold for. Now, declare accordingly, you shaddy criminal!
Are you telling me that every time I pay food delivery via BTC I have to visit the tax man?
Yes, you should..... Maybe I am also counting on them not figuring out. But a taxable event is a taxable event, no matter what you think.
I will give you an easier example, in Europe:
You are European. Your currency is EUR. You exchange now 100.000€ for $117.000. Now you sit on it for a couple of years. Now your dollars are worth more EUR an you use them to buy a house that is worth 120.000€. Ok, you are suppossed to pay for 20.000€ capital gains. Get it now?
Of course, it is very unlikely they get you if you don't declare. But you are a shaddy criminal anyways