There is no guarantee that stable coins will be safe, learning from experience in the LUNA case, even stable coins can collapse if the main support collapses. I only use stable coins that have been proven to have a strong foundation, such as BUSD and USDT.
Nothing is safe with stablecoins or even with altcoins. Once you enter the market, it is called risk so invest with the amount you can lose. USDT and BUSD are also centralized stablecoins, which are difficult to crash but they can freeze your assets at any time. They are not as safe as you think, never hold them for long time.