-snip-
It is difficult to know what is meant by considering bitcoin as a "disaster" or a "calamity" - since there are some folks who might not know how to consider their risk and/or to attempt to manage their exposure to an asset such as bitcoin in accordance with their own particular circumstances - because bitcoin could be a disaster/calamity for any of us if we end up over investing or even under investing. If we overinvest and then we leave our bitcoin with third parties or we try to earn yield off of our bitcoin, we may well find ourselves with way less bitcoin than we thought that we had or that we have some or all of our bitcoin locked up (bankruptcy proceedings or whatever).
-snip-I am also surprised by those who consider Bitcoin a "disaster" or "calamity" because Bitcoin is not here to destroy but to be a differentiator in the context of giving everyone freedom to the economic system.
That's why I have the view that intelligent people who have the ability to think above average and have financial capabilities should be grateful for the presence of Bitcoin as a transparent new concept.
In learning there are stages where each stage has its own goals that are interrelated.
Regarding risk, we can say that every business person is familiar with overcoming or managing a risk.
IMO, those who consider Bitcoin to be a disaster are very good at hiding the truth.