I have been hoarding coins for close to a decade in fear of this situation.
We are being pushed into stop using coins. I will not be pushed, but I will push back even harder. I have saved all change that is in my pockets at the end of each day. I have several 5-gallon jugs of coins and bills that were in my pockets.
I love going to those coin machines and finding leftover change. Many times I find silver dimes or Canadian coins.
Manual coin sorters are inexpensive. Automatic ones are a little more. Spend a few hours and you might be surprised. A gallon of pennies is ~$50!