it is mostly digitalization though not just bitcoin. for example when we use our bank cards (debit cards?) instead of cash that is exactly what you mean and it has nothing to do with bitcoin. the problem is people still continue to use cash so it won't solve this unless it is a 100% removal of any usage of cash which is impossible. at least for many years.
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Indeed its digitalisation itself which can help reduce such incidences. I think there should be more than this, government themselves should take care of such things from happening and must look after this. The implementation of the digital payment system and transfer of the money Reserve Banks to local banks would be great chance to secure the funds itself, they can increase the safety of employees and much more. I think government should educate people to use digital payment options more than cash and for that to happen they should stop printing the cash itself.