Ego is the illusion of feeling separated from the external world/reality. It is an absolute necessity for survival. Dissolution of ego comes into play only after one is done surviving. Only then does ego feel like a burden. Dissolution comes from an immediate experience of reality in a selfless state. It doesn't come from stacking sats. As long as one feels separate, regardless of doing selfless deeds, ego is still there. Just wrapped in a disguise.