Writing on the wall
unhappy future outcome
Red-letter day
a noteworthy/memorable day (pleasant)
Flash in the pan
a success which is unlikely to be repeated
Pay the piper
bear the consequences
Hobsons choice
no choice at all
Ivory tower
state of priveleged seclusion from the real world (isolated from everyday life)
Money etymolgy
derived from epithet Moneta attached to the goddess Juno. Mint also derived from moneta