They are planning to end physical cash system and promote only digital currency so that everything would be under their control. If anyone goes against their will, their bank account can be frozen.

With the current trend of Banks closing out, it is one of the first steps for the media to promote how the banking system does not work so everyone will be given reason why digital cash is better. Then there will be a big announcement that all cash needs to be exchanged for digital cash. People hoarding cash will not be able to convert to digital currency because they will need to show the source of their cash.