Well said,I agree with your point except where you said Exchanges are safe to hold Bitcoin. I believe this is not the first time investors have been warned never to use centralize exchanges to Hold their Bitcoin assets because they can be hacked. Its fine if your using this exchanges to buy Bitcoin but it's not ideal to hodl because of the risks. Rather than Hodl your bitcoin stash with this exchanges where you don't have complete control over your asset,I prefer you start making use of a non custodian wallet to store you Bitcoin. A non custodian wallet is safer and it allows you to have complete control over your asset through your seedphrase.
yes it is really a bad idea to hold bitcoin in an exchange since we don't have complete control of our assets aside from the fact that it can be hacked the exchange itself can come up with one policy or they can just decide to disable one account without any tangible reason. If I should recount my experience with kucoin, it was not really funny at all they just wake up one morning and then decide to place my account on withdrawal suspension without no just cause. Luckily for me I wasn't using it to hold bitcoin, so I was actually wondering what would have been my faith if I was actually holding my bitcoin there. What you are saying is right non custodial wallet is the best because one can never encounter this kind of problem I had with kucoin in non custodial wallet.