Not your keys Not your Bitcoins?

correct! Just like the money in the bank is not yours.

I agree with it 100%!

So

Tell me maybe, how much is 1 Qubit in terms of TH/s or GH/s, how do i calculate it?

I agree with this thesis, if these are not your keys, you have no right to use them and get rich on someone else's.

Of course. Just as we do not give anyone the keys to our home, car or account password to manage on our behalf, also in the case of cryptocurrencies, the highest security considerations must be observed. Sometimes we have no choice and while waiting for the execution of a buy or sell order, we have to allow the stock exchange to take control of our Bitcoins or other cryptocurrencies for some time. However, this time should be as short as possible. Treating the stock exchange as an additional wallet is a mistake because we have no influence on any decisions that will be made behind the scenes. Maybe the stock market will be shut down tomorrow or the owner will run away with the money or die, taking the passwords with him to the grave, as it probably happened in Canada? Or it freezes our funds, demanding a pile of documents about their origin? A hacking attack may also happen, and in this case it depends on the decision of the stock exchange owners whether the lost cryptocurrencies will be returned to us. Therefore, the surest wallet is the one for which only we have the password.

Yes, of course the whole truth!

I agree, kind of yours but whoever has the key rules

Supposedly. However, not everyone is responsible or afraid of responsibility enough to keep their money in their wallet ;p, and part of the BTC community simply does not pay to send bitcoin to the wallet due to high transaction fees..