system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why is Thanos the only one with the plan to get and use all 6 Infinity Stones?

The earthly MCU villains wouldn’t know about the stones (except Ultron) but the non Earth MCU villains clearly know about the stones. 

Loki, Hela, Ronan, Malekith, etc know about the Infinity Stones, and all have the power to wield one, so why don’t they try to get the other 5? Why doesn’t Ego try to get the stones? 

Is Thanos the only being powerful enough to wield multiple infinity stones?
gpt
I would also add that events have transpired in such a matter that all the stones were obtainable. 

Time: Protected by the Ancient One for ages, a highly powerful sorcerer. Her demise and passing of the Stone to a gifted but relative rookie in manners of a grand scale made it easier to grab. 

Reality: Hidden away for ages by Asgard, only recovered due to the machinations of the Dark Elves. Would otherwise be protected by Asgard, but Asgard has been under internal strife and conflict for a while. 

Power: straight up hidden. But it’s discovery set into motion events that would lead to every other stone.

Soul: also hidden, for a very long time. Others HAVE tried to obtain it, possibly as a way to the other stones, but they lacked the conviction of Thanos.

Mind: seems Thanos had it all along. He may have been holding onto it waiting for the right time. But then a sequence of events saw it leave his grasp and tumble around Earth.

Space: also protected by Asgard for eons, recovered and then lost and then recovered again. By cosmic scales it was recovered relatively recently in WW2, and all other stones at this time were still hidden or under safe keeping.

And that’s not to say nobody else has tried. We know the Collector has an interest in gaining all six stones just to have them. Asgard was well aware of the power of the stones and may have collected some of them, but realized their danger(reality and space were known to them). 


I would wager that the events of Captain America ultimately are what set things in motion. A stone is uncovered after a millennium and openly used on a backwater planet. Later on the events of Thor lead to a weakened Asgard, and Thanos takes note. He likely had Mind already, and was working to get his hands on Power as well. Now he knew he could get Space, and thus began to act. He may have known tIme was on Earth and thus saved it for later, with Reality and Soul hidden. 

His gambit in Avengers and GotG initially failed, but succeeded in getting half the stones in the open and “protected”. In fact, by making sure the stones were in known locations guarded by those who would not seek to use them, it made collecting them child’s play. Despite his failure to get Power and Mind at first, they were trivially easy for him to obtain.