I have no doubt of the data - but even if its gains outpaced the market returns of stocks - they have better liquidity, are lower risk, and can payout dividends

I have no doubt of the data - but even if its gains outpaced the market returns of stocks - they have better liquidity, are lower risk, and can payout dividends. The thing about lego sets as an investment opportunity is it's beanie-babies all over again. It's easy to end up with cheap junk that nobody wants. Higher returns does not mean it's a "better investment".