The problem is that we have not any major exchange for BTCz,, but don't worry, be patient.
In (near) future, majors exchanges will registering BTCz for free because BTCz is one of the better crypto project, with BTC.
Use donation for major improvment, test, community support (website, blog, howto, tuto, video, audio, translations...)
That's it ! Be patient, buy BTCz, mine BTCz and hold BTCz : the goal is arround 100 KSatoshis for one BTCz :-) : the same capitalisation as BTC, in a few years.
Projects need time to build up strong community, and collect funds for exchange listings.
Most of crypto exchanges have changed to become more greedy, especially since the blossoming period at the second half of 2017.
They often ask for extremely high listing fees.
Of course, it will be good if someday Bitcoin Z can be listed on bigger exchanges, like Binance, Okex, Huobi, etc.