We all know that Bitcoin transactions are not anonymous but pseudo-anonymous, resulting in many problems like tainted coins etc.
Some cryptocurrencies offer significant more privacy (Monero, Zcash etc) but at a cost.
However my question is more fundamental: How 'much' privacy do we really need for a widely-adopted cryptocurrency?
I believe Bitcoin as-is won't get adopted for everyday transactions. Nobody would want showing his buying habits to the whole world (imagine how many ads and flyers you would get).
On the other hand, I don't believe cryptocurrencies that offer too much privacy will get adopted either, since they will be used for criminal activities and eventually get banned.
My feeling is that we want a currency that offers privacy to some extent, without revealing our transaction to the world but still be possible for law-enforcement to track illegal activities.
What do you think?
