could you double a dollar ?

here goes 'Keep It Simple Stupid' (KISS)

THIS IS A FACT UNBELIEVABLE BUT IT IS TRUE

IF YOU HAD $1 AND YOU DOUBLED IT ($2) AND DOUBLED THAT EVERY DAY
$1 BECOMES $2
$2 BECOMES $4
$4 BECOMES $8 DOESN'T THIS SOUND EASY?

I BET YOU'RE THINKING THAT'S A COUPLE HUNDRED DOLLARS AFTER A FEW WEEKS?
THINK AGAIN... OVER A MILLION
IF YOU CONTINUED THIS FOR 3 WEEKS (21 DAYS) ITS 1 MILLION

A PENNY FOR YOUR THOUGHTS... OR SHALL I SAY A DOLLAR OR TWO?