Having a market cap? You mean a non-zero market cap?

Or do you mean a greater vs. lesser market cap? As compared to what?

If market cap was intrinsic value underlying itself, the business would be irrelevant. That is a circular “origin” of value that even novice investors would want to sell out of. That doesn’t work.

Success that matters for investors isn’t evidenced by a high market cap. But by a market cap not keeping up with business growth. I.e. shares becoming undervalued. By actual/predicted growth increasing faster than cap, or cap falling faster than actual/predicted downturns.

No, market cap is a representation of the expected future success, but share cost depends on this expectation. Higher expected future success, higher share cost. So, the only reason to buy shares is if you expect the market cap to increase.

(I think, someone please correct me of I'm wrong?)