The Theymos estimate was "couldn't be stable at more than like $5k max" I think he said.
No theymos said $6k- is solid, and $6k-$10k is semi-solid. He thinks $6k is about as low as it can go, and that fluctusting between $6k-$10k is probable.
I've been feeling that the price jump has been built on FOMO speculation for a while now. I think that the real, solid base is around $6k (roughly following the longer-term linear trend), but I expect speculators to stabilize it if it reaches $10k, at the very least, and then those prices might or might not stabilize.
So IMO $6k and below is "solid", $6k-$10k is semi-solid, and everything above $10k is a house of cards. No idea what'll actually happen in the next few days, though; it's pure speculative madness. In the next hour, I wouldn't be surprised to see a drop to $10k or an increase to $16k.