I have heard of these guys but I don't really listen to them. What's interesting to me is there is no realisation towards the manpower that is underneath Bitcoin. Think about the amount of utility that's emerged since it's creation. The jobs it's made, the time people have spent understanding it, the people it's housed and the companies that have been erected since inception.
If that's not tangible then I don't know what is! :)
You are right, bitcoin is more tangible than many other things people put value in.