“This is the story of the revelation in late 2013 that Bitcoin was, in fact, the opposite of untraceable—that its blockchain would actually allow researchers, tech companies, and law enforcement to trace and identify users with even more transparency than the existing financial system.”
Provided that the exchanges are cooperating (voluntarily or by law).
Why do you think NK and other “impenetrable” countries are so fond of it? It provides them with the means to monetize something otherwise pretty useless: their relative independence and the resulting potential for secrecy.
They are turning into new-age Swiss banks, keeping anyone’s private ledgers private. For a hefty sum.
And one does not need a strong currency to achieve that: other cryptocurrencies are also perfectly usable.