Huh? One company valued xobni at $20m - how is that the be-all, end-all of valuation? If I value my company at $500,000 and someone offers me $100,000, am I wrong or are they wrong (or are we both right) when I turn them down?
Answer: you don't have enough information to make a decision.
until someone else gives you a $500,000 valuation your company is not worth 500k. So far Xobni is only worth 20 million. They are hoping that one day they will be worth more.
Answer: you don't have enough information to make a decision.