Exchanges are not really safe. The question is whether you are safer.
Do you trust them more than you trust yourself?
Who has your best interests at heart?
Exchanges are not always transparent with what they are doing with funds, they are centralised, so they are a target for regulators who may either shut them down or force them to hand over their info on you, they tempt "trading" (which in many cases is just gambling, and they can shut you out of your funds. If you have your private keys (which are kindof embedded in your seed words) you always have access to the crypto....as does anyone else who knows those words.
I would get a ledger and use Ledger Live for monitoring (downloadable add on). The seed words are your key, not the actual device. Keep those seedwords carefully and offline.
Only buy from the company, never ever second hand.
Secure your crypto assets such as Bitcoin, Ethereum, XRP, Monero and more. Give yourself peace of mind by knowing that your cryptocurrencies are safe
www.ledger.com