Yes, indeed, increasing zeros technically again (and maybe later, again) would defeat the problem of resolution loss... temporarily!
It also introduces two, now inherent weaknesses to the system:
-now, technology has to increase just as fast (or faster) as the population using the system. It does right now, but will it do that later on? We just dont know: what if the government shuts down the internet (Pol-Pot scenario), the bomb drops, or the aliens land. Will the system still work? What if we dont find any real more new technology, but the amount of people on this planet ,using the system just grows and grows. Will technology always keep up with population? We hope. If, for some strange reason, technology stops growing, coins will get lost, and the system will die of resolution loss. The system is now depending on technology to provide ever increasing resolution (by adding zeros). If, for any reason, technology fails to deliver... game over.
-its not a problem now, and when it does, a possible solution is at hand, but is requires constant attention from now on. People will have to guard this 'boundary' of the system, and raise alarms and update the system in time, in a far future. Who? When? Where? Automatically? Projects can live for a couple of years, but what if support dwindles, and no-one updates the software anymore, leading to resolution-loss-death-system.
Now we have 2 dependencies: technology has to increase, and someone has to check if the system needs any higher resolution, even in the far, far, future.
If thats the only way to go: fine. But if the system can get rid of these dependencies, even better.