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When you do talk about safe then this would be particular talks about on your coins to be on your own personal non-custodial wallet and once you have
let or stored those coins on 3rd party providers or services then those coins arent your completely and does remove the word "safety" that you've been
talking. About interest on annual basis then they do over 4-5% as far as i remember which you do seem to be worthy on the risk that you've been putting? I think not.
This is absolutely true!
Not your keys = Not your coins.
Well, that is a golden rule of a good cryptocurrency holder, all of you have a point here. You must have the key and never trust exchange or even the custodial wallets, it is very simple if you don't have the keys, your bitcoin perhaps at risk. Choose an open-source wallet that you have full control over the key, at this point, you perhaps safe but it depends on how you will keep your key in a safe place. However, regarding the exchange mentioned by the OP, I did not try to use that exchange but for me, I will do what I have said above.
Yeah its the golden rule but there are still people whom do fail to do even with this very basic idea..This is why when the time they get hacked or scammed then
thats the time they do really make out some learnings and make some regrets in their entire life.People wont learn or realized if they dont experience those.
Keeping those keys should be your main priority because this is just like giving your pin code into your own atm wallet card.So basically
showing off these sensitive informations isnt a must thing for other people to see.