Current blockchain interoperability solutions mostly involve building ad-hoc bridges (Cosmos, Polkadot). As the number of blockchains increases, doing it ad-hoc is no longer an option. We just can’t build N2 bridges.
Scheduled for Q1 2020, Incognito Portal takes a different approach: build once, work with any blockchain. Portal is a general bridge design that connects Incognito to any number of blockchains, allowing for secure two-way transfers of crypto whenever privacy is needed. This means any coin can now be a privacy coin.