Return on investment
Investors are either behind family fortune (never work with them) or for rich clients as investment vehicle. Both need returns 2-3 times better than stock market darlings.
Investors only want to share your success, they don't have interest to make you success.
As of 2020, at the rate of governments printing free money and injecting into the economy, investors want 3x return in 1.5 years. They need to find the next buyer.