As your company evolves, so will your investor pitch. At the idea stage, you are mainly concerned with explaining your idea and establishing you as a credible entrepreneur.
But with a product up and running, a few customers, and some revenues, investors will turn to other things like customer acquisition cost, churn, customer close rates, whatever is relevant for your industry. Inevitably, your deck will become less creative and resemble more a standard business presentation full of numbers and data.
Do not use the pitch deck from last year for your next investor meeting.