The ability to shutdown any persons the government doesn't like using any growing list of $Excuses is worrying. Currency is a freedom to perform transaction and arguably a given right, it's existed since humans learnt trade. Cash allows anyone to transact without a prerequisite or control. Two parties. Centralised digital currency will change it. That worry doesn't even include the privacy concerns and as systems bec…
Nor does it save you from 90% of transactions you do. Banks will know when you deposit/withdraw money. Stores know the moment you walk in. Unless you deal purely in cash (and I mean PURELY) someone somewhere will know when and how you're spending your money.
If you want to deal with privacy concerns then it needs to be codified in law. And that involves dealing with the entire chain, not just point of sale and not just thinking cash will save you.