The general thoughts from this thread and the linked article are if you've already accumulated "enough" you should begin to think about lowering your risks since you no longer need the rewards those risks provide.
this is a good point, that I was awkwardly trying to articulate in my last post.
I'm a poker player, and good tournament strategy is such that you take risks early on to build up a big stack which is extremely likely to see you through to the final table. But once you've successfully built that big stack, you MUST switch gears and your #1 concern becomes protecting that stack while managing to slowly increase it to keep up with the ever rising blinds and antes. (equivalent to inflation). That is how tournaments are won, NOT by going balls out every hand but by taking calculated risks and then protecting the proceeds.
At some point, more money won't increase your quality of life nearly as much as the risk is worth. Where is that point? It will be different for everybody but if you cannot imagine a point that would exist for you, you are playing a very dangerous game.
My dad had a friend who retired early and owned 6 luxury homes across the world in luxurious places. He carried mortgages on all of them and "leveraged" that money in the market. in 2010 he lost everything and had to move back into his "primary residence" which was protected through bankruptcy court, but even that had a mortgage. His primary residence is a very modest home similar to the one I grew up in. Now he, his wife and his son and grandchildren all live in this 1 house together because his son had taken a very similar (though smaller scale) investment approach to his father. Pretty sad.
My dad, on the other hand, lost pretty big in the great recession as well. He lost over 700,000 but he was hedged and didn't go bankrupt at least. Now, he's almost back to where he was. So he basically suffered a 6 year set back in his financial goals, while his friend lost it all.
I think owning real property (not digital shares of real property) is an important piece of diversification.