I hear this a lot.
Here’s the truth: it’s completely false.
There are plenty of examples of successful businesses that were started by people who were definitely not twenty something:
Reid Hoffman started LinkedIn at 35
Vera Wang didn’t start until she was 39
Henry Royce of Rolls Royce was 41
Ray Kroc of McDonalds was 51
Anne Boden of Starling Bank was 54
Charles Flint of IBM was 61
Colonel Sanders of KFC was 65 when he sold his first restaurant to focus on his fried chicken recipe.
You don’t suddenly stop functioning properly when you hit an age that you consider to be “old”.
You can still speak to people
You can still make sales
You can still develop a product
You’re still passionate about your topic
You are never too old to start a business.