the USDT is stable it does not fall more than 1 dollar, so you are leaving your money stable!
With BTC anything can happen.
you have 10k if you sell to USDT you get 10k if you do not sell and the BTC drops you can only get 5k. more if you switched to USDT and the BTC drops to 5k and you see that it will rise, you can have 2 BTC.
