First Time Founder - Top Down Sales vs Bottom Up Sales: Which is better?

As a first-time founder, I'm preparing to launch ProspectEdge.co. My company aims to assist founders, sales teams, and marketing teams in finding, engaging, and winning top prospects using AI-powered market insights. We transform various data sources into tailored B2B sales opportunities and marketing strategies. Two questions I'm considering: 1. Which sales approach should I use? - Top-down: Targeting company executives directly - Bottom-up: Broad marketing with low-touch sales 2. What are the most effective sales and marketing strategies for my new venture? I'd appreciate insights on these questions and advice for first-time founders in the B2B AI space.