Yep, polkadot have the same potential as polygon. however, when compared to BSC, I strongly believe that nowadays people will tend to prefer BSC over polkadot. even, when people choose between ethereum and BSC, maybe BSC can still excel. I think currently the order of the network after Ethereum, the best is BSC.
Most people prefer BSC on top of Polkadot simply because it has many projects built on it. The vast majority of NFTs are built on BSC these days, so Polkadot's going to have a hard time to reach the top. Nowadays, convenience goes on top of decentralization so any platform with popular dApps, tokens, and services will surely gain the most attention in the mainstream world. Polkadot would've been a big hit if developers ramped up marketing/promotion efforts. It has the potential to take the decentralized web by storm. Without mainstream awareness, how can you expect it to soar towards new heights? As long as Binance Smart Chain is in the lead, Polkadot won't be going anywhere. Just my thoughts
