https://www.startuphacks.vc/blog/founders-guide-to-secondary...
I know plenty of founders that gave it all and then some (including their health, their family relationships and in some cases their lives) and that ended up worse than the shape they were in when they started. So yes, you hear a lot of stories about secondary stock sales and so on but those are the exceptions and very much not the norm. That's just survivorship bias.
Most businesses of all sizes, shapes, and forms fail within 10 years.
I hear this all the time with variations to the number of years, which makes me suspect it isn’t true.
Starting and maintaining a functioning business is difficult; the default outcome is failure (the end of the business as an operating entity) and you have to work to prevent that from happening every day that you want to remain open.
And I've never seen a claim that the majority of businesses fail in a year. Most anecdotes say a majority fail within 5 years, which seems to be approximately correct based on US data.