Hi there, this is not meant to discourage anyone from giving you an answer, however, this is a fairly popular question, so you might like to read these threads where /u/Georgy_K_Zhukov, /u/Bernardito and others discuss this very issue:

https://www.reddit.com/r/AskHistorians/comments/4pc0pk/did_hitler_really_survive_until_the_90s/d4jqb5b/

https://www.reddit.com/r/AskHistorians/comments/2wra1z/did_hitler_fake_his_death_and_lived_in_argentina/

https://www.reddit.com/r/AskHistorians/comments/22jdbn/is_there_any_evidence_hitler_committed_suicide/