Bitcoin was originally meant to be a decentralized digital currency, but its volatility has led many to see it more as an investment.
BTC's volatility does not affect its decentralization, there is still no central authority in control and the network is run by the community. There is nothing wrong if people find different use for BTC, their coin, their choice and there's no control, so people can do what they want with their coin, but it does not change the core purpose why BTC was created.
He points out that most people see Bitcoin more as an investment asset than a decentralized digital currency that they can use to make peer-to-peer transactions without involving a central authority. This is true because most new investors who enter the market barely know why Bitcoin was created in the first place. If you ask a new Bitcoin investor about what Bitcoin is, they will most probably say it is an investment asset instead of a decentralized cryptocurrency.
Leave retail investors, even institutional investors are into Bitcoin because of its volatile nature, which creates the potential for them to earn money on the money they invest in Bitcoin, and to be honest, this thing isn't harmful because Bitcoin's quick adoption is also a resultant of the same thing. We would barely have this many people interested in Bitcoin if it was only for the technology, but we do have so many people interested because there are profits attached to it.
It's a double-edged sword, so to speak.
The price and volatility of BTC push people into it, and investors and higher institutions too, however, most of them wouldn't want to know the details and beauties of it - they would just do it for the buck, and that's okay.. However, those interested in the ideas of BTC and what it stands for would benefit from it the most, in my opinion, simply due to knowing so much more.