About health and personal safety. What is the most reasonable insurance?

Insurance doesn't mean that you don't have to do it unless you are sick, such as special circumstances.

Insurance allows you to arrange your income reasonably (force you to save), help you manage your finances, avoid taxes and debts reasonably, and transfer your personal assets. Buying health insurance means putting a condom on your health. After decades of hard work, it has become the spoken language of our older generation before liberation, and I believe you have heard of it. Moreover, health insurance was originally prepared when we were not sick, so it is necessary and most important to buy a health insurance for ourselves while we are young.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.