What does it mean "ze next bitcoin"? Can you explain that please?
My opinion Bitcoin is well known and hold number 1 position in the cryptocurrency world, Zecash is improving some limitations of it and and wants to become next generation leader after bitcoin.

Bitcoin is still holding strong, who would've thought it would go on for so long. But a lot of other coins are providing new options.
Bitcoin has been, is and will continue to be stronger. I only consider the meaning of "Ze next bitcoin", actually to replace bitcoin isn't simple and Zecash is probably just a new option, not the coin can do it.
I don't know, I see some coins attacking that position in the near future, especially Ethereum that is in a sense more stable then Bitcoin and is, therefore, a better option for all coins to be associated with.