The mistake is thinking your startup idea is venture-scale and getting on the VC treadmill. Once you’re on the treadmill, here’s what changes:

1. High growth expectations: VCs are looking for companies that grow big enough fast enough. If your business isn’t suited to this kind of rapid growth, it can lead to undue pressure and unrealistic expectation

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So many founders have a great idea but can’t figure out how to sell it. Second-time founders know that they shouldn’t even bother with an idea if it is not sell-able. Marketing risks force you to face the truth: Do you know enough about your market to know how to sell it and who will buy it?