By training all skills which would take several years. Heck it took me about 2-3 years to get 99 ranged.
Chat with our AI personalities
to change your stats on runescape all you have to do is level up.
Zezima
Heaps. iT takes 4000 hours of work to get to level 99 in all skills (according to runescape)
It depends how long you are on Runescape.
If you go on runescape highscores, you can see that lots of people have 99 skill level in everything. Every single one of these players will have all the skill capes