you don't need to worry about one day but if you are worried anyways you could try to get some rub-on wax maybe. cheap and DIY.
There are many insane people out there that will tell you that the white chalky on your board means it is ALREADY RUINED! Your RACING career is OVER if you don't upgrade NOW NOW NOW!
With that said, any wax you put on those areas is better than letting it go dry.
With that said, it's not going to amount to much if don't wax it.
Those areas that are chalky, you will notice that they will get chalky looking faster and faster. When they get chalky like that, they dont absorb the wax as well. It's a vicious cycle.
From what I've read, clean grind clean base wax, base wax, base wax, daily wax to resolve.
You'll be fine though. If you let it go too long you will eventually make the board bottom uneven, make the edge bevel different than intended.
For 95% of us, this is of no concern