You can upgrade if you want, but you won't be doing yourself any favors. Those upgrades you put off will still need to happen and loot doesn't exactly get better with each TH you go up.
I'd get your defenses and elixir upgrades finished first. You should be able to keep your builders busy for another month or so before you upgrade. Trust me, it is worth it to only have to worry about TH9 upgrades when you hit TH9.

