All exchanges also do not guarantee that the coins we have will be safe for a long time, some bad things can happen like some exchanges that have disappeared from the cryptocurrency world. Since the beginning of my acquaintance with Bitcoin, I have never left my Bitcoin or Altcoin on a cryptocurrency exchange because there was once someone who put his coins on a crypto exchange for a long time, but after that he tried to check his coins and it turned out that his coins were no longer on the crypto exchange.