We can only leave the balance in the account if its not lost in gambling. Lol
Most often we don't have any money left to gamble at all. Many people including me gamble until all the amount is lost or we are exhausted for the day.
Hahaha, you are right

Not at all because I always save some amount that I prepare to be used for the next days so I can directly play without depositing more money

Now that's a rare trait. Most people gamble the money they deposit immediately but you have the resistance to control yourself and wait for the next day.
I generally deposit and play immediately and lose it all most often. The other times, I just save a few bucks and play some other day again.
If I get the free spins I use that first before making another deposit.