Bamboo is not 100% scratch proof, but it is about as hard as hickory which is very, very resilient. You can look up the numbers on the Janka scale if you want. The problem with bamboo is that it is highly reactive to moisture. You could end up with a buckling floor if you live in a climate where you get large humidity swings and if the flooring isn't installed with a very generous movement gap around the edges and at doorway entries beyond a certain floorspan. I have friends who installed bamboo flooring in their new remodel and ended up with a horrible buckle in the middle of their open-space kitchen/living room that ended up being cut out and patched with an obtrusive trim board. You don't want that. I'd go with oak. It's a standard flooring wood for a reason. It is resistant to moisture changes but still has some flex to it so it won't crack like hickory which is a very dense wood. It might not be quite as scratch-proof as bamboo or hickory, but it will give you fewer wear issues. Look at Loba 2K Supra AT for a coating to get the ultimate in a wear-resistant floor for decades to come.