Ok, but then the fee is not "proportional to the bitcoin price" as I thought you said.

That probably means you misunderstood what I wrote. I said it would be no problem as long as bitcoin price commensurate with the fee, is just another way of saying the fee being fixed at a certain % of the bitcoin price, thus no problem whatsoever regardless of big or small purchases.

Oh, but I fully agree with you.  I always say that bitcoin is by far LESS private than fiat.  Bitcoin is a privacy night mare.  It is absolutely NOT anonymous on the contrary.   This is why people doing dark markets with bitcoin, tumbling on an FBI tumbler, are out of their mind.

This is why I only consider seriously anonymous coins, like monero, and to a lesser extend, zcash (lesser, because not compulsory anonymous).  (DASH is a joke in that respect).

But people will soon learn this, and it will be another reason to avoid bitcoin.

It is very unwise to avoid bitcoin. Besides, bitcoin never promises anonymity. Instead, it promises (a certain level of) privacy. Whether a cryptocurrency is fully private or otherwise, requires the recognition and support of the shadow government to work. Or else it won't. If I were to issue a better version of bitcoin into the world, nobody would give a shit about it and it would die out within a year. Where will I get the money and the resources to promote it, to  have a bunch of guys traveling around the world convincing everyone about how good is my version of bitcoin, to convince the exchanges to list my version of bitcoin, to convince companies like Microsoft, Overstock, Ernst & Young to accept it as payment, to convince governments to legalize it, etc etc etc? It may be a better version but unless it has the kind of support backing it, the same kind of support relentlessly backing bitcoin since 2009/2010, and expanding, it will never survive no matter how good it is, no matter how private it is, no matter how secure it is.