Aside from a dozen or so non .com domain names I registered over the years, I have been strictly a .com domain investor. On my NameJet and GoDaddy auction filters, .com is the only extension checked. There may be value elsewhere, but .com domain names are the focus of my business, and I do not see that changing.
I am not opposed to purchasing non .com domain names. It would be foolish to cast off everything else particularly as times are changing. I did not feel like spending my money on alternative extensions when there are so many from which to choose. I felt like it would be very difficult to pick winners, and I don’t want to keep spending money renewing losers, particularly when some have much higher renewal costs.
Over the years, I have mentioned my willingness to buy non .com domain names when I see the potential to make money. I have wanted to see mainstream companies using a particular extension, and I have wanted to see companies willing to spend money acquiring non .com domain names. After all, when I invest in a domain name, I want to be confident an end user buyer will pay a premium over what I paid. I don’t want to see end users buying them simply because they are cheap and available. This would indicate that making money as an investor would be challenging.