Then you should try to get a little bit more far-sighted 
Although your post is quite provoking and being based on false assumptions, I take the freedom to answer you in a constructive way.
Thatās what Nu does - just like central banks do.
The fiat issued by central banks is typically backed by the economies to which the fiat is tied to. This is in difference to the former gold standard model, which was due to the inability to spawn gold at will limited in its scalability.
NBT are backed by NSR. The value of the ābankā that issues this currency is what warrants the value of the currency - and that is more fair than what central banks do! They issue fiat and hold the society captive and liable for it. If the central banks mess up, the society pays for it.
If Nu messes up, Nu pays for it.
Fiat holders would be just as screwed as NBT holders in the case of ācentral bank defaultā. But as a lot of the fiat holders are part of the society that needs to pay the bill in that case, they are hit twice.
Thatās much more fair with Nu. Thereās only one more stable pegged crypto currency, that is designed on a similar economical concept: bitUSD.
Nu supports CNY, USD and EUR liquidity operations as well. And Nu supports not only the sell side, but the buy side. So you can sell CNY, USD, EUR and BTC for NBT and vice versa.
You should hope that this still works if you need to.
Tether is centralized and keeps the collateral as USD. Pray that these USD wonāt get stolen by hackers or employees and donāt get frozen by the government of the land where Tether hosts the relevant bank account(s).
If you like crypto currencies because itās so hard to regulate and confiscate them, you are dead wrong betting on Tether. Youād be wrong at coinoUSD as well. The latter ones might use blockchains for accounting purposes, but they are central entities directly connected to fiat.
Thereās so many vectors to attack them.
If you are interested in a truly decentralized pegged crypto currency, thereās not much more than bitUSD and NBT which meet the requirements.
I canāt say how reliable the peg of bitUSD is after the switch to BitShares 2.0, because there has been no volume at exchanges and only two exchanges support bitUSD currently.
But Iād still rather use bitUSD than Tether or coinoUSD.
Choosing between NBT and bitUSD I end up with NBT because it has shown a tight peg for more than one year even under high pressure due to exchange defaults in February this year. Seeing that NBT is capable of handling daily transaction volumes in the millions (USD) makes me confident that NBT works as designed.
Especially if you look at the ratio between NBT supply and daily volume, you will recognize that NBT is a very good currency which is a very appreciated means of exchange.