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NXT = Not Mineable = SCAM
Just difrent dystrybution model which coin you chose is up to you and your preferences ...
Becouse most people here are miners that doeasn't mean that all coins should be mined...
Scam or not is matter who made coin and how they use "premine" mostly premined coins are duped and
devs run away so people need big awarness to shit like that but there are also legit premined coins.
In general people should think which coin i would use rather than which coin is best to invest only using alts can make them high not
"investing" today most easy to use is BTC later who knows probably those which will be fastes no blockchain download and secure.
Fast and minimal that is how word evolution is going all time just look around.