It is always good to take what Buffett says from the standpoint of his role as investor. Remember Ben Graham defined investment as something that offers a high probability of return with a low probability of loss. Whereas speculation should offer even higher possible returns for more risk. Buffett doesn't really comment on the long term nature of blockchain or digital currency but on the nature of current investment opportunity. This is almost exactly what he said during the dot com years. From his point of view he'll probably be proven right as new technology and frontiers tend to have a speculation period before normal investment criteria can be applied. The fact that he puts a five year period around his ideal put says something. He knows it could take time to sort out. His good friend Bill Gates has acknowledged that blockchain is an important technology and I think pointed to Ripple as a significant development. It is important that we accept our role as speculators as that is an honorable role similar to entrepreneurship in general. thanks for posting