hello guys what is the best blockchain to deploy on... polygon, eth, moonbeam, bnb?

Depends what you want to achieve, what kind of project you launching. ETH has more capital, polygon is cheaper tx, bnb is in between i would say

I am about to launch nft market place.. currently building in polygon testnet

Best to do some market analysis first

Audited? Got VC?

Unique Selling Point?

i run the ui connected to local contracts on ganache, makes it easier to work with for me