RE: We can make crypto tangible and spending private using smart contracts: here's how

It probably sounds a lot because of how I explained it, it generally is a one transaction process, everything else just depends on how the funds will be used.

That said, this is different from Bitcoin paper wallet because that is just a wallet, whilst with the concept explored here, we are dealing with smart contracts specially designed for spending crypto like tangible cash.

I believe I've heard about eCash a couple of times, never really got into it, will have to take a look now that you're mentioned it.