... but you always have to worry about 51% attacks and such. With NXT you just don't have those worries...
I need to have a crash course on the actual mechanism that solves the Nothing-at-Stake problem in NXT!
My current understanding is that there is none, and it is therefore a no-buy.
The best place to ask is nxtforum.org as all the devs have moved there now.
I am not technical enough to explain. Likewise, I am not technical enough to explain how Bitcoin works exactly. The point for a user is, both Bitcoin and NXT solve the consensus issue, except in NXT you can't easily buy 51% of the mining power.