It's pro-social to get vaccinated now, for the following reasons:

1. Vaccines that are already delivered to your country are not going to get shipped elsewhere. They have a shelf life and (especially the MRNA ones) don't always travel that well. Vaccine supply to the third world will be shipped from factories, not reclaimed from vaccinations sites now.
2. Switzerland and other western countries will be more willing to release supply/not buy more when their population is protected. As long as they feel like they have a clear need then they will oppose sending vaccines elsewhere. 

Those two factors make it clear that getting a shot now will more likely decrease (marginally) the time to diversion of significant supply to other places that need it more.

I've followed Zvi's COVID updates and analyses for most of the pandemic, and from that + other readings, my opinion is that you ought to get vaccinated as soon as possible.

Whether your country actually transfers those vaccine doses to other countries in need is out of your control, plus seems like a low probability of actually happening in a way / quickly enough for your 2 doses to have any negative impact whatsoever. If spare doses even get transferred at all, which...unfortunately has not happened nearly as much as it should have since vaccines became available.

Edit: My answer is an emphatic No, you are not anti-social if you get vaccinated now.

You are both Swiss citizen and a world citizen. 

There are some diverging interested between the population of Switzerland and the population of the whole world. 

If you cooperate with either of the group agenda of the groups you belong to, that's not antisocial. 

Systematically, I do believe that as an individual it's worth to cooperate with vaccination policy of the country in which you live and that the more people cooperate with the health policy of their home country the more effective the policy will be generally as there's less resources spent on internal friction.

If you live in Australia that has strong border I think you can argue that controlling Covid is more or less fine. In a country in Europe with relatively open border there's no control and the Delta varient multiplying in some corners. 

Stamping out COVID-19 everywhere is a way to prevent further dangerous mutations and for that it's good for Western countries to go to herd immunity.

No. The value of getting vaccinated is unaffected by the ease of access to it. Sending it first to the places where is it hardest to distribute is inefficient: it burns resources that could have been better used. That would not be virtuous, but merely virtue theatre.