It's called stopping lose, this is what USDT and other stable coins are good for so yes it's a good move to safe you from loses, if you are into crypto for long term I suggest you hold USDT because once in a while opportunities like this will always come
Why USDT? in this time, I think stablecoins are useful for purchasing major altcoins and btc as the market is seems in bad shape. Now that is recovering, might wanna purchase more as the market is going to a huge advanced now.
If at a time like this is used well then I think it will be profitable, like yesterday bitcoin fell to $ 5,000 and now bullrun comes with 24 hours bitcoin growing at $ 1000 is it unprofitable?
Bull run comes? This isnt what you called bullish, but just a temporary effect of market trading. A small recovery cant be categorized as bullrun. It seems you are just speculating. Profitable or not, we should act cautiosly here, its not that bitcoin could reach 1k price suddenly.