It is not surprising that authorities are trying to curb physical money, after all cash offers anonymity far superior to anything we invented so far.
We live in times when governments will tell us that ban of high denomination money (India) or purchasing anything with €1000 or more (France) is made illegal because it helps terrorism or mafia.
Introducing another level of restrictions and bans will not help the society - instead we will go towards Orwellian future when everything is controlled.
I don’t think so, they may try to get control over everything, but the harder they struggle to get that control, the harder a portion of the population will push to avoid being monitored in every single thing they do and crypto currencies are a way to counter that.