Bitcoin as digital gold, calling it nutty stating its long-term value is more likely to be $ 100 than $ 100,000. Bitcoin use is limited to transactions - making its purportedly more vulnerable to a bubble like collapse. Additionally, cryptocurrency energy intensive verification process is vastly less efficient than systems rely on a trusted central authority like a central bank ..
Do not forget that fiat usage is also limited to transaction and as not collapsed.
Everything that surrounds us in one way or the other is connected to transaction. People will always transact business and payment will always be required, this is the solution cryptocurrency as brought to the financial industry to make transaction easier and friendly.
Bitcoin is at its early stage of adoption and its gaining more popularity than Fiat currency, we can see with many big players like VISA, Samsung, Facebook and so on planning to join the digital currency world, and with this, bitcoin being the king of all will be difficult to ever collapse and all these wishful thinking of bitcoin getting low to $100 is just in an imagination.