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.
"$6k and below solid" has proved to be very correct on 6th of February, and I'd not be surprised if that gets proven once again if we touch that mark again in upcoming days (jumping again from $6k to $10k+).