Shopify has 800,000 customers, 4,000+ employees, and handles over $40,000,000,000 per year. And you're building something from scratch, starting today, that is

Shopify has 800,000 customers, 4,000+ employees, and handles over $40,000,000,000 per year. And you're building something from scratch, starting today, that is going to be bigger than Shopify in a fast enough timeframe that your Rails server today is the biggest concern?