Yes, there is truth in your words. But we must not forget that the dollar is overvalued in the same way. Many currencies are dying. But I do not believe that the etherium will fall. More and more iso is tied up on the etherium
You cannot very well predict that the ETH platform will not fail, we all know about DOA hack that happened in the past and we are seeing some vulnerabilities and if there is any other major issue with the platform it will fail without a doubt and if that happens the price might fall to zero.