And when this will happen with ardr?
The current "ARDR" is only a token on the NXT blockchain.
When Ardor is released, you will get real Ardor coins (not tokens!) on the Ardor blockchain for the ARDR tokens. That's the whole purpose of the token. So there is no "free money" this time, sorry
The ARDR tokens on the NXT blockchain will probably be burnt after the Ardor launch ... or become worthless, the same way than the JLRDA tokens.
so then is it better to transform ardr tokens into nxt? Why is ARDR more valuable that NXT on coinmarketcap?