The festival founder made the claims following a year when the music event sold all of its tickets in under two hours and before the headline acts were announced.
However, Eavis has suggested that Glastonbury is "on the way out", predicting that it has "probably got another three or four years" before he would have to shut it down.
Citing a tough economic climate, increasing demand for international headliners and cheaper alternatives as possible causes for the festival's decline, Eavis explained to The Times: "Partly it's economics, but there is a feeling that people have seen it all before. Womad and Latitude are not selling out... We sell out only because we get huge headliners."
The 75-year-old also noted the lure of foreign festivals such as Spain's Benicassim as a possible reason for the decline of UK festivals, as the weather and price point of European music events could seem more appealing.
Eavis recently revealed that he has the headliners for Glastonbury 2013 already lined up, as the festival will take its routine year off in 2012.
> Michael Eavis 'fears Glastonbury is becoming Kate Moss show'
Watch Beyoncé perform 'Irreplaceable' at Glastonbury 2011 below: