Will it only be used for investing/speculation as long as its price is this unstable? Can you imagine a normal acting like bitcoin does? I guess pink papers/penny stocks do that but those are just legal pump and dumps that clog up your work fax with junk faxes that come through at 4:00AM making sure you will se it.
But I don't invest and I don't speculate, and I know for sure I must not be the only one not doing this. Yes I hodl but I also spend and earn in Bitcoin for many years as a supplement income to my normal day to day job. People do it more than me too as I can tell, and it's been successful for them.
Imagine running a business without needing Paypal approval as you can charge and bill in Bitcoin?