There are approximately 8,300 crypto-assets but most have little value, with the total market cap at around $1 trillion led by Bitcoin at 63.5% dominance. The document discusses definitions of crypto-assets and how they differ from traditional financial assets, including being a digital representation of value that can be transferred electronically using distributed ledger technology. It also outlines regulations from the EU regarding crypto-asset service providers and their requirements around custody, trading platforms, exchanges, and advice.