No. Stable coins do not give you any profit even after many years. Their price is stable to some extent nt the reason its named stable coin. Tether remains around $1 or a little bit below this mark. It never surpasses it to jworth 2+$2 irrespective of how bullish the market is.
As I said, stable coin can give profits if the fiat coin used to buy the stable coin losts value
For example, I live in Brazil and we use BRL, and I need 5 BRL to buy 1 USDT for example, and if I buy 100 USDT and one month later I need 6 BRL to buy 1 USDT it's a profit situation
So it's wrong to say we can't have any profit with stable, but it's not recommend, there are easier and better solutions to buy USD for example
what you give is a simple example how you can profits from this stable coin. but for those wanting larger profits, don't expect it from stable coins as they have very little fluctuation in its value. Also, not all stable coins here have real backing of their respective fiat currency. So you need to be very careful about these stable coins, as they may fall down anytime when the team behind it decide to stop their development or one of the team members decided to run away with large amount of coins and sell it to the market.