@Hovis
Historically it seems more likely that you'd lose money by sitting on it as prices have been going up and up. That said, at the moment, at least in my area (SE London) then prices seem to be stagnant if not dropping slightly.
I'd guess that now is slightly less risky to have a gap between buying and selling. You could be a bit more attractive to buyers and sellers, and if prices aren't climbing then you might not lose anything by waiting.
Caveat - I have no absolutely no idea what I'm talking about
That's my point - I don't think we're in bubble territory anymore, prices aren't marching ever upwards (and I don't think they will, certainly not with all the Brexit clouds looming).
@Hovis
Historically it seems more likely that you'd lose money by sitting on it as prices have been going up and up. That said, at the moment, at least in my area (SE London) then prices seem to be stagnant if not dropping slightly.
I'd guess that now is slightly less risky to have a gap between buying and selling. You could be a bit more attractive to buyers and sellers, and if prices aren't climbing then you might not lose anything by waiting.
Caveat - I have no absolutely no idea what I'm talking about