Jaesun I didn't actually think that a Rifter cost half a billion.
The most meaningful way to measure inflation in EVE between 2012 and today would be to gauge PLEX (Pilot License Extension) costs today versus then. Rich PvP veterans (or privileged nullbears) basically play EVE for free via the PLEX system. Rubes and noobs buy PLEX for $, then sell it for ISK; the PLEX can be used to purchase account subscription time.
CCP have changed the way PLEX works since I last played. PLEX used to be a single "ID card"-themed item that sold as one unit, but now comes in 500 pieces that resemble gold-pressed latinum
, and the actual monthly subscription cost has increased, not surprising since I last played twelve years ago.
Furthermore, the game is definitely on the decline. It's over twenty years old, for fuck's sake. So, PLEX prices (for veterans buying it with ISK) are higher than they otherwise might be, because there are significantly fewer new players shoveling money at the game.
So adjusting for the fact that the PLEX supply is low these days, and very roughly speaking, an individual ISK today has about half of the buying power it did in 2012. I would need around 1 trillion ISKies net worth today to have the same buying power I had in 2012 with 500bn.