Is monero, zcash and dash all of them using a private blockchain?
because based on my research monero is using a private blockchain to protect your privacy and make the transaction untraceable that is why monero is so popular i
in the darknet world right?
But zcash is jclaiming the same thing to make transaction with privacy and untraceable also but they are using a public blockchain how can that be possible?
Thanks in advance

I prefer monero because of the fact that you are essentially forced to anonymise your coins. ZCash and Dash both have optional privacy which basically compromises the whole thing a little bit if you know what i mean.
Yes, they all claim that they are the best, but as i said, i prefer monero.
Plus, monero has the best community out of all of the above altcoins, it's definitely not just for dark web activities for sure.