Everyone and everything will be forgotten. And it will be because we stop talking about it.
Elvis Presley was always in the conversation with documentaries and public sightings.
People purchased his memorabilia. And the prices went high. Then those people got old and died. Their adult kids now have all this memorabilia in their possession and they are selling it all off. But the price has gone down, because the same people who would purchase the Elvis memorabilia are also dead and their heirs are also trying to sell it all off.
Seen any sales of Larry Bird jerseys or David Beckham jerseys recently.
It takes about 20 to 30 years to forget. But not if we keep telling the stories. Stories keep people alive and stories keep the music alive.