We see with our own eyes every how risk adverse and defensive Moyes is - he won't even play two strikers, and likes subbing on Dustbin for the one that is left on the pitch...
Bearing this in mind can you really see him giving in his safe ticket here, packing it all up to go and live in Spain with a club that is historically been quite unstable (Yes, Jesus 'Mad as a bottle of crisps' Gil, I'm thinking of you). Plus, the current Atlético President is a silvery haired, bespectacled famous Cinema Producer - can't see Moyes falling for a luvvy like that...
I hope he stays and I'm sure he will. He may move to another UK club, but a move at Atlético? Would be totally out of character for the man.