I believe that this is just temporary. Terra Luna's team already released a statement about this case. ..
Yes, this is indeed a temporary price reduction, but it shows the vulnerability of such stablecoins and the insecurity of investors who have decided to keep their money in UST. But it should be assumed that when the value of UST is fully restored, the holders of this stablecoin will decide to replace it with a more stable stablecoin, such as BUSD, which has not yet seen such drawdowns in price.