Yes, there will, unfortunately. There is always tax.
This part I agree with though 
Although there is a balance with these coins, how well audited they are, how much we can trust the companies behind them etc. It feels like they are different to BTC in that they all seem to require trust very much like a bank, but not regulated like one. So potentially it´s the rock/hard place to an extent. As I say though, I am not familiar enough with all of them so happy to know more.
One thing they may do is reduce the forex risk, but again I am not sure they will.