If I'm alone should I pay for an actual seat?

So I'm going alone to a concert. I've done this plenty of times before but usually I have a seat so that if I get up to get a drink or go to the bathroom it's there when I come back. General admission for this concert is significantly cheaper than the seats but I'm worried about if I have a spot in GA that I won't be able to get up the entire concert because someone could take my spot. Thoughts?