Seeing the current state it would most probably be oil
Cash but unfortunately it is not safe from inflation so the second most liquid there is is gold. Gold coins
Water is most commonly found in its liquid form.
Money
The comparative adjective of liquid is more fluid and superlative adjective is most fluid.
Budget is forecasting future cash needs and cash is most liquid form of money at present.
The least liquid asset that most people have is their house.
Liquid form
mercury
it has intrinsic value
Treasury bills
Water is the most dense in its liquid form.
The most abundant form of water on Earth is liquid.