In the simplest sense, Polkadot is a platform that connects blockchains together, and it also supports new projects. One can imagine that Polkadot is a station, from which transactions are trains from other blockchains that can be linked and transferred to each other easily, but in the station itself there are business departments, they are the projects that launch on Polkadot. STP Network is one such project, it makes the tokenization of assets more convenient and efficient.
I see Polkadot as one of the breakout projects of 2020 & is leading the trend in 2021. Polkadot will not become the second Ethereum, Polkadot's goal is even bigger, it is to be the leader of every blockchains.