There are so many different ways to trade the markets that each 'system' can co-exist to a reasonable point (i.e. not all systems can be profitable) and not break the game.
And the markets change so much and so constantly that your 'holy grail' might be nothing more than a relic in 10 years.
I.E., what happens when you teach your kid the ultimate 'pit' trading system and the pits go away? Or short selling is only allowed after the third uptick? Or whatever.
Much better to teach the kid how to trade and how to develop his own robust systems. The old "give a man a fish, he eats for a day, teach him to fish and he eats for a lifetime" argument.
And who better to teach him than you, if you have been so profitable?