According to Foresight News, HashKey Exchange said that individual professional investors refer to high-net-worth individuals with a minimum portfolio valuation of HK$8 million. Individual retail investors who apply for upgrades need to upload asset documents, including bank statements, securities statements, and trust certificates issued by custodians. In addition to accessing fiat currency trading pairs of mainstream cryptocurrencies such as BTC and ETH, individual professional investors can also trade stablecoins and access all cryptocurrency pairs.