As you know that you need to stop and leave the game? How can you feel this moment. I almost always lose their money because they can't learn when to leave the game. I'm not sorry to lose. I have a lot of money not to lose, but I can't keep the winnings if I'm lucky.
You have the freedom to leave the game because you have as much money as you say. In fact you play just for fun not for profit, if you make a profit from gambling, you better leave the game after you make a profit and come back the next day. Because if you keep playing after earning a profit you will lose it all because of your greed that always feels lacking in what you have earned.
It doesn't matter when you play your games. You can play all at once or you can spread them over the years. But fact is, the more you play the more money you will lose. There is absolutely no way around this.
With that said, there's largely two play-types that can be used to not go broke and enjoy yourself.
Set a win/lose limit and turn around when you reach them and set them up in a way that will allow you to play over longer periods of times opposed to blowing your stash in one go.
Or do small bets and set yourself a time limit, then just keep playing until your time is up.
Depends on what is more fun to you, the act of playing in and of itself, or the excitement of seeing larger numbers pop up during wins/losses.