All those "super rich elite" clubs just alienate noobs even more about BTC since they think they are the Rothchild equivalent for fiat money.
But they'll always be with us whether we like it or not. As unsexy as it may seem, you do need some folks with a bit of financial muscle to get things moving.
So... more or less than 500 now? I would guess less. The distribution function continues as volatility rolls on.
I'll guess that the club membership is lower, but the individual stacks of those who remain are becoming increasingly monstrous.