Why hasn’t the US one dollar bill been updated like the other currency denominations?

Question

All the other denominations over $1 have gone “Bigfaced” and been colored other than green. Why not the one-dollar bill?

In: 1216

Answer 1

there is no real reason to go through the expenses of counterfeiting a dollar when it takes the same amount of effort to counterfeit larger denominations, earning 20 or 100 times more than a dollar.