How high can Ethereum go in 2040?

Can you provide an informed opinion on the potential growth trajectory of Ethereum in the year 2040? Given the rapid advancements in blockchain technology, increasing adoption of cryptocurrencies, and the potential for Ethereum to further solidify its position as a leading smart contract platform, what factors might contribute to a significant rise in its value over the next two decades? Additionally, what challenges or obstacles could potentially hinder its growth and what strategies might be employed to overcome them?