I never understood this logic. Investors want unicorns but it's not like they're going to hate you for only giving them a 5x ROI.

Most startups either fail or become small businesses. Investors are giving you money to fund a business that you own. Depending on the terms you can, and should, use that money for whatever you want.

Its the investors problem if 5x returns aren't good enough, not yours. Does the bank call you to complain that your mortgage interest rate is too low? No. They gave you the loan with what they thought was reasonable terms at the time. It's not your fault they gave you the money too easily.

You should be focused 100% on building a successful sustainable business. Investors can fuck right off if they push for risks that could turn their 5x return into 0.