It's easy to laugh at people for their past mistakes, but how many of us Bitcoin users today have ignored Bitcoin in its early days? Probably a lot. Or how many of us didn't buy Ethereum @ $1 to sell it today for $1,200? The same goes for Apple, Tesla, Amazon and other stocks that have mooned. There's really not that much difference between not buying and selling or in this case destroying the key, all these action mean lack of belief in long-term performance.
Its not just Bitcoin either, this is one instance where history has repeated itself over, and over. Some people overlooked the importance of the internet as a recent example, which now dominates probably the majority of the populations time. I believe people are cautious by nature, and therefore tend to not like change. Therefore, they stick with what they know, and there's a few pioneer within the world which start to bring the adoption to the masses, until it catches on like a wildfire.
Hopefully, we don't only just seen Bitcoin skyrocketing in the near future, but we also see more adoption in mainstream companies, since those (pioneers) would be exposing the Blockchain, and Bitcoin to more users. Paypal recently had this effect with them adopting Bitcoin, I've heard numerous people around me talk about Bitcoin, because now all of a sudden they trust it a little bit more that a company like Paypal has shown interest in it.
Although, hearing this is quite entertaining, because of the way they rubbished Bitcoin, I wouldn't laugh at them. They were very close to actually discovering something extremely profitable, or if they broadened their minds a little more, something much more important than that.