I have to agree with them. Every week that passes without a new company in any local metropolitan area deciding to accept bitcoin as currency is a two weeks further away from bitcoin actually being adopted, mainstream, as a currency.
Bitcoin is an investment. A stock or an asset class/commodity can be debated, although it doesn't much matter. Bitcoin is a store of value not a medium of exchange.
The concept of bitcoin has changed a lot from the initial stages as it was meant to be a currency with literally zero transaction charges but things have changed considerably from it and now it is a store of value rather than a currency that can the transferred easily at a cheap rate.With the implementation of lightening networks i think we will get back to normal.