Say, someone wants to buy 2nd hand ps4 from someone. Why would he be so eager to use cryptos with anon feature and hide his transactions?
There's always been the chance of governments attempting to outlaw cyrptocurrency outright. If they don't do that, they might also attempt to kill it with overbearing regulation, or according to Anonymint, confiscation. People see anonymous coins as being a safeguard to both of those variables, amongst others. Purely speculative on my part of course.
I agree it's a safeguard to those things you mentioned.
However I was thinking about general privacy and anonymous coins being more useful for illegal marketplaces like Silk Road etc. (Not that I use them but whatever)
With all the revelations by Edward Snowden about how there really isn't much privacy left in this world people will want to have their finances private more than anything I think.
With Bitcoin you can have privacy but you would really have to take serious measures at every step and screwing one thing up and everyone can have an insight in your finances, every transaction is recorded in the blockchain forever.