What are synthetic assets in blockchain primarily used for?

Synthetic assets in blockchain are primarily used for representing and trading real-world assets. This innovative approach allows users to create digital representations of physical items, such as commodities, stocks, or fiat currencies, enabling them to trade these assets on decentralized platforms without needing direct ownership of the underlying asset.

This functionality promotes increased accessibility and liquidity by allowing investors to gain exposure to various markets without being limited by traditional financial systems. For instance, someone can trade a synthetic version of gold without actually purchasing physical gold, broadening trading opportunities and fostering more dynamic market activities across different asset classes.

The other options, while relevant to different aspects of blockchain technology and trading, don’t capture the primary purpose of synthetic assets. Trading derivatives directly on exchanges focuses on a specific financial instrument rather than the broader representation of assets. Creating cryptocurrencies from scratch pertains to the development of new digital currencies, which doesn't involve the representation of existing real-world assets. Lastly, securing transactions on the blockchain is related more to the consensus mechanisms and cryptographic techniques used to ensure the integrity of transactions, rather than the function or purpose of synthetic assets.