I'm reading this book in conjunction with an online lecture series on abstract algebra by Benedict Gross, a Harvard professor who was once the dean of Harvard undergraduate programme and then the dean of Harvard College. So I feel in safe hands, especially when this book looks as intimidating as it really is. Someone here mentioned that it was 'good for hitting people with' and I agree wholeheartedly, this is a real brick, at 900 pages, and a very unusual one at that, as bricks to my knowledge are usually of a red, earthy colour, whereas this one is yellow. I suppose this is an allusion to the fact that mathematics isn't really of this earth... (unlike what Tegmark claims...)
In any case, I'm learning abstract alg because I need to know what rings, ideals, and polynomials of multiple variables are (and how they behave) as these seem to be the main objects of study in algebraic geometry.