That's pretty much the argument made against any gun regulation, because pretty much anyone who wants to commit a gun crime can find a workaround.
"including checking suspected bank transactions with a warrant"
Assuming one is not using cryptocurrency like bitcoin to store money and make transactions.
> Assuming one is not using cryptocurrency like bitcoin to store money and make transactions.
All transactions in Bitcoin are public. It's a public ledger that is barely pseudonymous. So, it's actually even easier for law enforcement than with banks -- you don't need to pick up the phone to investigate a transaction history.
My opinions haven't changed, but I'm a little more wary of the rhetoric being thrown around.
Instead of reading it as something negative about encryption, you can think it as a positive.
In the sense, that the argument shows that encryption has all the "freedom", "individual rights" etc benefits touted for gun ownership, but without the bloodshed that is associated with guns.