It is possible to "overthrow" capitalism, however, without bloody revolutions.
Personally, I only think a bloody revolution is necessary if you're trying to do it too soon (e.g. USSR). Unlike the cartoon character implies, it's not the global conversion that's the main barrier so much as it is not having achieved a level of technology so far where high standards of living, health, food, decent entertainment, communication, transit, etc. can all be maintained with little or no labor. We weren't there when the USSR formed, nor are we there today.
But eventually (probably not too long) when we reach that level of technology, then the only purpose of laboring will be propping up a laundry list of unnecessarily stupid luxuries. Like for instance, owning some new kind of oven that cooks stuff in 30 seconds instead of 5 minutes and costs $20,000, or having serpentine green marble tabletops in your kitchen instead of granite, etc.
The USSR took on as its major symbols icons of labor, but I think this actually is an excellent reflection of it's fatal flaw: it shouldn't have been attempted in a world where labor was still necessary to meet needs. Before you try to do something like that, you should already be at the point where LABOR ISN'T NEEDED anymore.
Your defining symbols shouldn't be labor-based, they should be art and learning and leisure-based, because those would be the proper defining characteristics of an actual functional communist society.
As we approach that point, it is likely to become increasingly obvious to people that they don't need to be working as much as they are, and they can slowly just shift to less consumerist behaviors.
We are already seeing examples of this with the surging "sharing economy." Capitalism tolerates it, because the organizing companies involved are still companies with shareholders, etc. But it still decreases bloat and starts chipping away at assumptions in people's minds about what they actually need to own.
I think it will still be limited by technology for awhile longer, but once it isn't, sharing economy is the sort of trend that can naturally flow right into what is effectively a form of communism, supported by an already-converted culture without really any need for bloodshed. At most, an administrative coup, and if lucky, merely leveraging pre-existing mechanisms for changing laws and constitutions.