Do you have the correct source for this quote? I would like see it.

Hard to earn - this is incorrect. It is very easy to earn provided you have money to buy it - that is speaking in terms of owning it. If you talk in terms of employment salary in bitcoin then its somewhat of a niche here and other freelancing sites with bitcoin as payment mode.

I think a bitcoin based economy will never happen completely. It will always be a mixture of fiat and bitcoin because both have their specific and fundamental properties which serve different needs. Of course some people will never accept crypto and so they will make sure that it never reaches or have difficulty in reaching mainstream.