According to Team ipernity announcement, ipernity is going to be closed down within 2 months.

...this lack of (ipernity) perspective forces us to consider the shutdown of ipernity, probably on January 31, 2017 (or shortly after).
source: https://www.test.ipernity.com/blog/team/4642052

Well, couple of days ago I finally decided to leave dead Panoramio (there is nothing much left and what to do) and revive my presence on ipernity. I felt good... as many of "old" Panoramio friends had been already there. And ipernity gave me that classical Panoramio look and feel, with only few features missing:
- zooming photos up to the size of the uploaded original
- larger and better map view
- unlimited and free upload
- access to the uploaded original photos without club membership (but I've revived the club membership).

And now... I have to look for a new home of my photos again. :(
Isn't it funny? I left last uploaded "farewell" photo on Panoramio redirecting my friends and followers on ipernity. Now, this redirecting link will be outdated and the target will be dead before the photo on Panoramio disappears. And I cannot edit the link on this farewell photo now. Good timing. 3:-[

I am worried about the fate of the next photo site I am gonna enter, as my last 3 choices were bet on a dead horse (first dead horse was album.olympus.cz). ;-)

I hate to say it... but highest potential and IMHO guaranteed near and mid term future (from business point of view) have Google Photos - they have important and maybe crucial role in Google eco-system, especially within Android phones system. Although there are many serious technical issues currently. And also some design features I don't like and features I do miss.

Another closest option is Flickr, but I guess it's future is not very bright too, as it's popularity is steadily decreasing and now seems to be defeated by Google Photos.

500px seems to be more suitable for ambitious photographers trying to market and sell their photos. Community is too much "popularity" oriented, in my opinion. I am missing some features too (download of own photos, zooming, automatic tags from EXIF).

Ok... Where do you go with your photos?

Popularity of discussed photo sites on Google Trends:
See: Google Trends

Just for curiosity: see ipernity, 500px and Panoramio popularity with better scale:

See: Google Trends

Instead of the popularity in the search terms , you might find more accurate and showing Alexa rank - which is a kind of popularity of web site domain itself, not only the search term for web name. Smaller the number in Alexa is, more popular domain is. Most popular site is number 1 (google.com), second most popular is number 2 (facebook.com) etc. Note that y axis is "raising" to smaller numbers to show higher popularity.

Panoramio:
Alexa rank of Google Photos cannot be estimated, as it is only a subdomain of Google.com, which is clearly number 1. ;-)