Proof is more important than money.
Proof that what you sell or teach works.
And you may not always have social proof and proof of work when starting out.
How do you gain that?
By teaching or coaching for free.
Or by offering free trials or samples of what you sell.
While you do this, be sure to record the evidence that your knowledge and stuff works.
This will be a win-win because through this process you’ll know that what you are selling works, and others will also know.