Why we going into web3? Decentralised! To avoid the depeg, terra needs faster action of burning Luna to maintain the peg of UST. But now, the only way that is to catch up the confidence of LUNA UST.
If terra still have the right to use btc reserve, add 1 more mechanism to aUST as 1:1.XX USD. Let say, we hold aUST and stake for a period can turn it to USD/USDT/USDC that supported by the btc reserve. Something like bLuna to Luna in Lido that needs a serval days/ month.
please becare of the fluctuation of BTC, or turn it into other stable coin. Dont leverage!