“We isolated all the large (≥ 50,000 Bitcoins) transactions which were ever recorded in the system, and analyzed how these amounts were accumulated and then spent. We discovered that almost all these large transactions were the descendants of a single large transaction involving 90,000 Bitcoins which took place on November 8th 2010, and that the subgraph of these transactions contains many strange looking chains and fork-merge structures, in which a large balance is either transferred within a few hours through hundreds of temporary intermediate accounts, or split into many small amounts which are sent to different accounts only in order to be recombined shortly afterwards into essentially the same amount in a new account.”
- Dorit Ron and Adi Shamir, Quantitative Analysis of the Full Bitcoin Transaction Graph.
Then the perceived value and the actual value would be off significantly.
So, while I might not phrase it in quite as strong terms as the person you're responding to does, I do find reason to be somewhat cautious about the whole enterprise.