A common belief is that investment from a top-tier VC can guarantee a company's success. However, the hard-learned lesson is that capital alone cannot create a successful company. True success is predetermined by the founder's quality and strong product-market fit; VCs can only help navigate.

YC distinguishes startups from regular businesses based on their potential for exponential growth, aiming for billion-dollar valuations. Profitability alone defines a business, but not necessarily a startup—a key concept for aspiring founders.

Club Penguin's co-founder warns that accepting VC money creates immense pressure to become a billion-dollar company. This often crushes otherwise successful businesses that could have been profitable at a smaller scale, making founders worse off in the long run.

Beyond product-market fit, there is "Founder-Capital Fit." Some founders thrive with infinite capital, while for others it creates a moral hazard, leading to a loss of focus and an inability to make hard choices. An investor's job is to discern which type of founder they're backing before deploying capital that could inadvertently ruin the company.

A common mistake in venture capital is investing too early based on founder pedigree or gut feel, which is akin to 'shooting in the dark'. A more disciplined private equity approach waits for companies to establish repeatable, business-driven key performance metrics before committing capital, reducing portfolio variance.

The hardest transition from entrepreneur to investor is curbing the instinct to solve problems and imagine "what could be." The best venture deals aren't about fixing a company but finding teams already on a trajectory to succeed, then helping change the slope of that success line on the margin.

Venture capitalists may value a solid $15M revenue company at zero. Their model is not built on backing good businesses, but on funding 'upside options'—companies with the potential for explosive, outlier growth, even if they are currently unprofitable.

The venture capital return model has shifted so dramatically that even some multi-billion-dollar exits are insufficient. This forces VCs to screen for 'immortal' founders capable of building $10B+ companies from inception, making traditionally solid businesses run by 'mortal founders' increasingly uninvestable by top funds.

VCs are incentivized to deploy large amounts of capital. However, the best companies often have strong fundamentals, are capital-efficient, or even profitable, and thus don't need to raise money. This creates a challenging dynamic where the best investments, like Sequoia's investment in Zoom, are the hardest to get into.