sell bitcoins locally, localbitcoins.com or on craigslist
how can they find out you sold for profit?
That's great for pocket change, but a bit harder to manage when its time to buy that castle. Especially if you are not in a heavily populated area.
Yes I love localbitcoins, but if bitcoins are worth 6 figures I think selling one at Starbucks for cash may pose problems. It's awkward enough at the current rates...
*sigh* decimals my friend.