In terms of fiat my guess is $7500 for 2022! 
But first they have to secure and improve their network.
They say that the "Ethereum Machine" is much slower than a mobile phone, so I guess that will need to change first! Just imagine what will happen with thousands of smart contracts are being invoked on the network at the same time, who knows what will happen!?
Nothing wrong with being positive and all of that, but that is simply too high, there is no way for Ethereum to reach that price, it will need to grow about 25 times its current price to get there and that is not going to happen, it is as simple as that, I think the rise in price is going to get slower now that is that high, similar to what happened to bitcoin. But first they have to secure and improve their network. They say that the "Ethereum Machine" is much slower than a mobile phone, so I guess that will need to change first! Just imagine what will happen with thousands of smart contracts are being invoked on the network at the same time, who knows what will happen!?
I think you will be deadly wrong. It will get higher than anybody could imagine