We hope the old days come back again were Manny Pacquiao will pick on Floyd Mayweather for another great fight after their retirement. This " Floyd Mayweather vs. Logan Paul - February 20" is just for fun for those who like to watch boxing on the basis of fun.
Time is off the essence, they are getting old and to fight there is a timeline and you cannot fight till you get to the grave. We might see an exhibition bout as mentioned by other users but you cannot hope for that. Logan Paul is a social media sensation and he knows how to attract the audience and Floyd wants to take advantage of this popularity and stay afloat in the media and that is the reason he is doing these on off appearance.