The real value of anything is always what people are willing to pay for it at that moment.
Thus if you see DOGEs are worth 175 satoshi then that is it's REAL value.
There is no such thing as an unreal value.

There is future value and that is something that economists and MBAs have been struggling with for centuries.
You can probably use an NPV calculation to give something reasonably close though, but NPV requires some amount of stability.  It can't be fluctuating 20% per day.