Have you never heard of dinky toys my friend? They were made to be played with and now clued-up collectors who started collecting when these were 'just toys' are now reaping massive rewards. I think that's the reason people are getting into Lego. These are the toys that hopefully in 20-30 years time the kids of today will be all grown up with lots of desposable income and want to start collecting themselves. Just as todays middle aged men want to reclaim their childhood buying dinkys. Of course we won't know if that'll happen for another 20-30 years. Big risk.
Is gold 'made to do profit?' It's a precious commodity. And so is Lego!