well if messi is that sick, he really is in a bad state and should see a doctor
he may improve with age, but one serious injury can finish him or he may just lose form and never find it again and ends up playing for a mid table club. nothing is for definate, unless you can actually see in to his future. alot of players like maradona, pele, cruyff do chat alot of rubbish sometimes and personally to rate messi as the new maradoni is far too early, i remember robinho being branded the new pele, either pele was a crap player or robinho was just overhyped already because not to say robinho isnt talented but hasnt come close to what pele achieved