Which coin is the best base?

[RoooooR]

BTC
LTC
NXT
QRK
XRP

I won't create a new coin, but I wonder your thoughts.
I think NXT is the best because more "green" but i guess it's hard to re-code.

[markm]

Probably whichever one has a most hashing power.

The non-mined coins unfortinately lack even hashing power to secure them, so securing them probably is mostly a matter of politics as in which other nodes do you choose to consider valid and which do you decide for whatever reason to reject... Certainly that seems to be how Ripple works, so that pretty much any node you choose to run won't mean a damn thing if the company decides to ignore your node's opinions.

Hash power is a little harder to ignore...

-MarkM-

[RoooooR]

Yes it is big problem for unmined coins. Anyway, I guess etherum can achieve these problems.

[griffinriz]

BTC and NXT 

[Voluntold]

BTC and NXT 

+1

NXT is far ahead of the others.