The question is: why would you want to know? the calculation will be based on a lot of assumptions anyway.
Or are you calulating when you would be a millionaire or billionaire ?
Instead of following news messages of people telling us bitcoin will reach $1 Million and stuff like that, I like to ignore them, sit back and just enjoy the ride
No matter what people / calculations are telling you... nobody knows for sure what will happen.
Look at it like a good book. You wouldn't read it if someone spoiled the ending for you.