Joseph Lubin, the cofounder of Ethereum, believes Ethereum will rise 1000x - implying a price of over $150,000 for ETH
Anything is possible, but I doubt Ethereum can get that high. It has historical issues and good competition.
Clearly his optimism is based on Bitcoin bullish sentiment, but I'd read his statement more like "I am confident in Ethereum and you should be too". And his confidence is biased.
I agree because Ethereum is one of the Altcoins that will be affected when Bitcoin's piice will go down. Hard to speculate but the possibility is always there. This could also be something that make hype. The questionis when will it happen? And how long does it take for Ethereum to reach such all time high. Though we will never know about everything but still 1000x is too hard to believe for now.