Maybe right now cryptocurrency isn't looking great I just don't see why he thinks Bitcoin is a complete scam. Buffet hasn't really given any reason as to why cryptocurrency is a scam.
We can express our diffirent opinions when it comes to cryptocurrency and Warren Buffet is only stating his opinions as we is very popular when it comes to investment or any financial matters. Yet we dont need to believe of what he say as we know what bitcoin can give to us. It is good to believe those people who been doing bitcoin in a long run because they are the expert than those people who didnt invest in bitcoin.