i don really get it actually..

why pay insurance now? whn u could pay later.. i mean like as u get older u pay a higher premium i get tat.. but why pay now!? isnt it abit like a waste of opportunity cost? we could use the money and invest it somewhere rather thn pay for insurance.

can someone enlighten me about this? my parents jus transferred one to me which thy paid since i was young.. to me i think its better if i pay later thn now..