Economic warfare sometimes escalates into overt warfare.

https://www.economist.com/finance-and-economics/2024/02/21/russia-outsmarts-western-sanctions-and-china-is-paying-attention

Aside from that risk, it is impossible to find a clear example of "sanctions" having ever had a noticeable impact on what dictators do (partly because dictators care about their own personal power, not the living standards of people under their control).

Besides, trade restrictions have usually proven easy to circumvent -- by those having powerful financial incentives to do so.

"Just as the West ratchets up sanctions, ways to circumvent them are becoming more sophisticated. Visit any country that courts the West’s business without buying into its principles, and you will find companies and people—hailing from China, Russia and the Middle East—under sanction and getting things done."