Those who hold USDT and USDC Will be richest people on earth becouse everybody Will need USDC and USDT to buy food,oil,and everything else If exchangers now offering USDT apy high as 15% apy then after 5 years it Will be 300-500% apy becouse all the world Will need and they Will fight with each other to borrow USDT or USDC becouse oil trading and commodities will be bought with only USDC or usdt the reserve currency of future.
This is where you are totally wrong. If the government, let's say, says the USD is no longer needed and it's no longer valued, then the USDT will also lose value. Why? Because the USDT, which is a peg to the real United States dollars, is backed up by the exact USD you proclaimed will no longer have value and that it will replace.
If the USD is being devalued in the real world, then there is no doubt that the USDT, which is the digital version of the USD, will also suffer the same fate, and if the entire world economy suffers recession and currency devaluation, then the crypto community will also suffer the same thing in terms of value. That's to say, 1 bitcoin might be worth 500–1 million dollars compared to the current market price, but in the real world, what will those 500–1 million dollars be worth? 100 dollars might just be equivalent to 1 dollar, which with the current value rate, what point and difference will that be?
So in as much as we actually don't like the banking sector and the way the financial system is being centralized and managed, dumping and killing them is not entirely the best option for Bitcoin or any other crypto currency to gain the popularity we all wish and hope for.