There are a lot of misconceptions around bitcoin and the blockchain technology. Bitcoin network can't be hacked. Your credit card is more likely to get hacked than bitcoin network.
About Buffet and Munger: they may be out of their depth on this one. Incidentally, Buffet admitted they missed the boat with google and amazon because they didn't believe in "mumbo-jumbo" business model of high tech industry.
I understand the concept is new to a lot of people. Those who understand crypto sometimes feel like people who invented cars... that they have to confront people who argue how cars make terrible horses. The argument isn't false, but the fundamental premise is misguided especially if your final goal is to get from point A to B.
If you like to follow big guys, see how Soros and Rockefellers are moving into cryptocurrencies. Here is the link: https://www.zerohedge.com/news/2018-04-08/rockefeller-familys-3bn-vc-fu…