Investors are increasingly considering DAI over USDT in 2022 due to concerns over the transparency and centralization of USDT. DAI, which is a decentralized stablecoin created by MakerDAO, offers a more transparent and decentralized alternative to USDT, which is issued by Tether, a company with a history of controversy and regulatory scrutiny. Additionally, DAI is backed by collateral in the form of other cryptocurrencies, making it a more secure option for investors looking for stability in the volatile cryptocurrency market.