You can play or just give the buttons a long time until you fall asleep, but will such a game be productive? After 6 hours of continuous play, I start to lose concentration and lose stupidly.
DON'T DO IT.......it's really stupid. When I was young ...fit healthy and very strong...I thought I was invincible... I pushed myself to the limit and thought nothing of it. I abused my body. I now have health issues I probably would not have had if I had looked after myself better....that includes getting proper rest.
No lenghy tournements for me. 2-3 hour max on one game . Good luck if you have 3 days to play one game. However it's time/$$ if the payoff is worth your time.
I spent hours in freeroll only to miss the bubble everytime.... then I got better and started cashing
Once I entered a tournament and did not pay attention to the structure of the blinds,the blinds for 20 minutes.My game lasted 15 hours in this tournament, I was very tired, but for this I was rewarded with second place, the amount was not bad)