Each Monday in March, we'll be speaking to the folks at Rajah & Tann to take a closer look at NFT's -- what these mysterious "Non-Fungible Tokens" are, what opportunities and pitfalls may befall potential investors and creators, and if there is a role for regulating this fast-changing new world. In Part Four, JP Ong speaks with Rajesh Sreenivasan, Head of Rajah & Tann's Technology, Media, and Telecommunications Practice, and Benjamin Cheong, a Partner at Rajah & Tann, and asks them just how impenetrable are blockchains and the decentralized systems NFT's and other digital assets are based on.