There is an important difference between avoiding tax by not incurring a liability in the first place and evading tax by not paying a liability which you've already incurred.
Yes, people who say 'nudge nudge, wink wink' are exactly the sort that look to minimize it, not avoid it... Buy high and sell low is certainly an ingenuous plan but what happens if PM's take off and you have to sell for more than what you paid?
Welcome to our addiction. Luv to think you're going to make money because that means I will too. But so far ...