Meme man

When this card enters the battlefield, set the
stonks value to 3.
At the start of each upkeep, flip a coin. If it's
heads then the stonks value increases by 1. If it's
tails then the stonks value decreases by 1.
At any time during a player's main phase, they
may pay X amount of mana where X is equal to
the stonks value. If they do that player gains 1
stonk token. At any point during any player's
main phase a player may remove 1 stonk token
and gain mana equal to the current stonks value