I don't disagree that it could work, but I'm also not sure it's that simple either.
There's a big difference in trying to get people to protest for the threat that is over the horizon than the one in power for 40 years. People just aren't good at conceptualizing the weight of that future pain against what they currently stand to lose.
And they could lose a lot - their job first, which also means their house and their health insurance. Not to mention plenty of laws criminalizing most protest already, where you are bound to be caught on camera or via other digital surveillance, and a single arrest on your permanent record means no future employment, and missed payments on your credit history means no future economic prospects.
And believe me I know the risk of that is worth it, and the risks you'd have in the future are even worse, but most people in the country still aren't ready to make that trade - hell, most still deny the direction things are headed.
Was looking through their website - they sell (or sold, it seems out of stock) a clear plastic card-sized insert for holding coins. As long as you don't need them often, it would probably be sufficient. But I haven't used it.