I'm not familiar with nxt assets, I was referring to POS in general. Having ANY POS whatsoever discourages spending and thus kills adoption. Having no POS encourages spending, because your money will be worth less than it is tommorow. Alt-coins are supposed to be just that, coins, a currency. If you dont want your currency to devalue you invest it somewhere(get interest at a bank, buy stocks w/e), you shouldn't expect the act of holding to be rewarded.