Short answer
Technically you will never lose.
Longer answer
When you stake your USDT they are stored away and locked. SALDA trades with the same amount of money you stake. Let's assume the market goes down or you decide to quit. You can do that easily. You can choose to close your account and withdraw your staked balance.
Why do we give you your money back if it is losing?
In trading, you can never lose if you don't sell. This is how we do it. We will not sell any assets we buy on your behalf if their value is depreciated. When you choose to quit and withdraw your money, we hold on to the assets we bought for you, and give you back your USDT.