e-cash / e-money
money that exists in electronic form and is used to pay for things over the internet
Danger money
Extra money you get because your job is dangerous
Plastic money
Credit/debit cards
Serious money
Big amount of money
counterfeit
illegal copies made in order to trick people
Pocket money
Not enough money. / Amount of money given by parents to their children.
funny money
money whose value changes often / illegal money
smart money
Money invested by experienced people / People who know about investing money
Hush money
Money given to someone to make them keep sth secret