You might be healthy, but you shouldnt think only about yourself. Pharma companies made record profits from vaccination programs (for which governments spent billions of euros of tax money). If people stop getting vaccinated, the profits will fall, and stock value will decrease. It could even be the trigger for an economic crisis.

So you should definitely get more booster shots, and tell others to do the same. I hope this simple economic argument can convince some of those egoistic anti-vaxers.