I don't know what happened today, I usually buy 5 USDT to play in futures and today I transferred 3.78 USDT to which it doesn't matter if I had the PnL in green with a +0.5 or +0.8, I noticed that my income wasn't increasing, it was only decreasing. I went from 3.78 USDT to 3.70 USDT, which made me take the risk to try to withdraw the same initial 3.78 USDT, and I did it with a +0.11. When I withdrew them, I thought about converting them from USDT to USDC and it went from 3.78 to 3.70.
Does anyone know the reason or what could have happened?