USDT is being used as an standard to evaluate the price of bitcoins because we need a fixed currency relative to which we can compare other currencies and assets. So, that benchmark is USD and if something strange happens over time and we see a degradation in the value of bitcoins then we might see a new benchmark but that is unlikely to happen frankly speaking.

I was wondering if there should be a universal currency maybe we call it as UNC and then we set it as a new standard but thinking alone cannot do it and we have to face that the real benchmark right now is USD and no reason to think that it is going to drop and inflation rate is not very high in countries like America.