Something is not adding up, Kevin O. Leary who also lost millions on the FTX crash is now after Binance CEO saying that CZ is responsible for the FTX fate, like CZ did it intentional and if CZ was silent the whole thing would have go on and become a success? I am quite lost with this man aim right now.

I think Kevin O. Leary is responsible for the Binance massive FUD withdrawal that took place days ago, he really wants to hurt Binance exchange by all means. 

You should try to give it a good thinking and see what's the intended workflow and then also explain it to us.

I expected the payments are handled by the cashier with a software and device provided by a bank or payment processor and you probably integrate with that.
Do you want to handle payments yourself? Are they bitcoin payments? Are they also fiat payments too? What you mean by fake payments?
Do you expect your database (with products, prices, tags/barcodes/QR) be ... public/exposed?

I'm not sure where you need cryptography for this though, since it's your own database.

I'm not sure I understand what you want to do. Do you actually want to verify the validity of the transaction or secure items against theft? What are barcodes used for? Are they assigned to specific products? Are they unique?
Can you describe the specific usecase better?

You are very correct without a doubt.  Why have I never lost my coins in an Exchange hack?  I have nothing to worry about, because I am in custody of my own coins.  It is kind of silly to blame others for something you were supposed to be responsible of, I would say.  But how many times did banks file bankruptcies and their customers lost money along our history?    Then why do people keep trusting Banks?  We are so silly!

Would say two things are happening.  These YouTubers focusing on reach and income rather than quality of information and many of them do not understand how Cryptocurrencies truly work.  If you want an honest YouTuber making videos about Cryptocurrencies, find one who does not take all and every single kind of Shit coin sponsorship.  Most of them sell themselves out by accepting to promote Shit coins out of greed.  I do not think there are many of them who actually provide accurate information and mostly focus on Bitcoin and the other Cryptocurrencies that actually have a future and value.

Reminds me of all these 'Climate Activists' throwing paint on art and gluing themselves to tables, concrete and walls.  They have no idea what they are actually protesting for and their actions make zero sense, but they want the attention and they are receiving it.  Similar to how in the middle of the Pandemic there were all sorts of people throwing out and supporting all sorts of information, whether true or false.  There is an entire community of them however, and they are making waves.  This is very similar to the reports you are talking about.  They have no idea what they are saying and they are looking for income and attention.  These kind of people will always exist.

But do not worry, their supporters will also be people who do not understand how Bitcoin works and why it is the future.  There are some people who simply like being stuck in a loop of infinity where they think they understand everything but in reality do not understand anything.

-
Regards,
PrivacyG

so you never did day trade, if you did day trade you would realize that the price can rise and fall at any time and that it is easier to keep the coins on the exchange so that when the price drops a lot, the person will be quick to buy and place stop-loss , how would you place stop-loss if you leave coins in the wallet? I would really like to know if this is possible, as far as I know it is not possible to do this


people need exchanges to buy bitcoin using bank account and people need exchanges to day trade


people are reporting what is happening, they are not spreading negativity


wrong, the responsibility lies with the exchange, when someone creates an exchange and people put money on that exchange to do day trade, the owner of the exchange has the responsibility of keeping people's money safe, you can consult anyone who understands about laws and you will see that that's how it works, i'm not a legal expert but i read that that's how it works


people were deceived and robbed, you wanted them to be silent? they have the right to create videos, post anything to draw the attention of governments and punish those responsible for this exchange


I disagree, most of the news is true, of course there are some that are rumors

Start to gather first your close friend to help you to start a small community. You can attract many interested user if you can showcase the benefits of Bitcoin through flyers distribution and bulletin board announcements. I once do this to promote my club on school before and we usually offer something to user that they can’t resist to come with us. Think of things that people in university like the most and use it as medium to lure them.

I would love to see some of your's theories / Data Models predicting something, Mr. Poker Player.