Currently, most of the hardware wallets do not support IOS devices except on MacBooks or any MacOS devices.

Do you have other devices like laptops or a PC? Hardware wallets like ledger nano mostly support Windows OS and Android OS but not in IOS devices.

Only safepal s1 and ellipal hardware wallets that I know support IOS devices but these are not well-known HW wallets, unlike Ledger and Trezor.

So are you planning to use API from Huobi or Binance?
I don't know if it would be a good idea because of the charge fees if the exchange you are planning to build is buying and selling then withdrawal fees from the Binance exchange is currently expensive like Bitcoin and ETH except on other coins.

If you don't have much knowledge in programming and it is for small business purposes in your local area. I suggest you can try to build and simple exchange site with WordPress and then use BTCpayserver plugin for Woocommerce payments there is two option the legacy and the v2 BTCpayserver for WP Woocommerce. Then use a free theme builder like Elementor to design your website. All funds are directly from your wallet so you need to host BTCpayserver on your own and if you want to accept other coins then you can add more but you need to host them on your own. Guides must be in BTCpayserver documentation.

Here's a sample exchange design that I found on Google using elementor theme builder





The advantage is you don't need to hire someone to build an exchange script and you are far from scammers.

I can't seem to find the multi-asset mode you talking about in the OKX exchange unless you talking about the Multi-currency margin mode?

I search a bit I tried to check every well-known exchange about these multi-asset or multi-currency modes but it seems only Binance and OKX have these options.

Why not try it I don't know if it will work where did you hear that?
If you are going to make a raw transaction through coinb.in you need any of these Address, WIF key, Redeem Script or Transaction ID.

But I think your case about your private key will not work on Coinb.in unless if it's a WIF key.

Can you post a sample of your private key(Not the original one) I receive a PM from you and you said you have the private key why not import it into electrum?
You can use this link below as your reference for private key prefixes and copy the example from that link and paste it here.
- https://en.bitcoin.it/wiki/List_of_address_prefixes

If you can take the kernel logs from your first machine with the 2nd hashboard(Failed) maybe we can see some other reason under your kernel logs why the 2nd hashboard chain fail.

You can post the whole kernel logs here and make sure to paste it inside the insert code tag(A # button when editing/posting) or you can use pastebin.com and share the URL here.
Sometimes the issue is due to sensors or overheating and kernel logs will explain everything that happens in your machine.

If the control board does not have an SD card slot then you can try to solder an SD card connector it looks like this below



Just resolder them with 30watts soldering iron and soldering lead.
Or if you don't want to spend you can directly jumper the terminals using magnetic or any wire just make sure there is no short.

What exactly is the mobile credit you are using is the prepaid load to buy Bitcoin? I tried to check the Coingate about this it seems it was already been deleted.

I think you are talking about a mobile top-up where you can buy BTC using a load?

I search a bit but it seems there are only two options where you can use that mobile credit and exchange it for Bitcoin. Paxful and localbitcoins are the only options you have.

If you are going to buy on Paxful just use the search button when selecting payment methods and use the keyword "mobile recharge".

The only problem is most of the offers there are 80% above the market.

What is your backup?
Seed phrase do not exist yet in the year 2009 and the public key you mention won't be able to use for recovery.

Maybe if you have wallet.dat file or private key then you can recover your old wallet. Do you have any of these?

Actually, it's not very picky most of the SD cards right now on the market are fake with fake volumes I have experienced this before when saving photos and videos and half of my files are corrupted that is why I end up using a tester/scanner SD card tool to know the problem and half of the total volume is fake.

I search about this issue on how to fake that volume and end up registering on a hackforum with a guide on how to make a 1GB SD card into a 2GB SD card this method is spreading and I think this is the reason why we have a fake SD card.

So only use authentic SD cards like Sandisk or Authentic Samsung SD cards. Don't buy those very cheap SD cards on the market almost all of them are fake with fake volume.

I haven't experienced any issue recently even on accessing other websites maybe not all people are affected by this outage and based on the status there are still rerouting servers.

The only two options that I know and experienced before are Aws CloudFront and Sucuri but I mostly use Cloudflare because it's free and there are many guides that you can find on Google.

There is only two option that I know best for on-chain analysis both of them are already mentioned above cryptoquant and glassnode.
Since you are asking for learning resources I would like to share this link below to learn more about FA(Fundamental analysis) with on-chain data.

- https://github.com/SpiralDevelopment/Awesome-Crypto-Trading

And take note that the link above is not only about on-chain analysis you can also learn about technical analysis and other trading strategies including all tools that you can use for free and paid.

Bitcoin is globally used as a cryptocurrency or digital money and since it's virtual money and there is no physical bitcoin you shouldn't call it a currency because it's a cryptocurrency.

And I think in some countries bitcoin is currently banned so it's not yet globally used. Maybe in the future, if bitcoin wasn't banned in all countries.

Why not use Binance over the other exchange?
In my experience after KYC, I never experienced any hassles using their service including p2p trading.
Unless you are living in the US? Binance US is very strict on policies compared to their Binance.com domain.
Be careful on using Kucoin if you are planning to trade there without KYC because you won't be able to withdraw without passing KYC verification. I heard someone experienced this and never solve his issue with a large number of funds under his account.

Actually all exchanges have strict policies if you want to avoid them then the only solution is to use P2P exchange that doesn't need any KYC verification.

Check this link below for no KYC exchanges.
- https://kycnot.me/

I think that is why he said he can't upload images without an account in imgur maybe he is trying to upload images through the phone which is no option or upload button when accessing the Imgur through a mobile phone.
But if he downloaded the imgur app he can able to upload without registering. On the PC when accessing the website the +New post button is there unlike on the phone.

I search a bit and both of them support paper trading but I never heard wundertrading before so I end up checking it through whois and this is what I found.



It is newly registered and I don't think it would be a good idea to use their service with your real account using API it is not safe to use unlike 3commas which is already tested by many people here on the forum.

Check the 3commas paper trading here "3commas Demo Mode"

If you are looking for more list of Bots then check this https://bitcointalk.org/index.php?topic=5278392

I do not know exactly what is pine script but based on Google it is a programming language made by TradingView so the script only can be used on TradingView.

Why not try other bots like Zenbot since you have two strategies that you want to try live I think Zenbot has backtesting.

Check their Github here https://github.com/DeviaVir/zenbot
Then use the search button under that repo. To find the guide about backtesting.

It could be a control board if the SD card flashing.
But how about the firmware you downloaded? What exact source where you downloaded the SD card image?


If you are looking for a repair center near in your area you can check this https://www.zeusbtc.com/ASIC-Miner-Repair/
You can also try some troubleshooting guides and solutions under that page just scroll down.

Day trading is not easy you need to wait for an opportunity to buy at a low price and sell a little profit when the price rises a bit.
Just like like today as sample image below.



If you bought BTC at around $17k and then sold it at around $19k you already made around 9% to 10% but the problem it is not worth it if you only have a small investment in trading you can only notice your profit if you have big amount of funds in your portfolio. And you should be ready for the price drop and set a stop limit before you lose more profit.

The only difference between a bear and bull market is that you can only get a small profit in a bear market unlike in a bull market you can make more profit and you do not worry about price drops because you HODL and wait for another price rise to cover loses.

There are lots of threads with the same question/topic why don't you use the search button above to find them?
Since you are here for almost 2 years and you are already a Sr. member you should already know how to use search button.

Anyway, check these threads below to get an idea about your topic.

- https://bitcointalk.org/index.php?topic=1090560.0
- https://bitcointalk.org/index.php?topic=5206704.0
- https://bitcointalk.org/index.php?topic=5337252.0

Bitcoin is too volatile no one knows what will be the price of Bitcoin and this is not yet the right time to decide if $20k is the bottom price of Bitcoin.
Bitcoin blockhalving is a good time to invest lo because if you know the Bitcoin price history you should notice that thing.

Check the chart from this link https://en.wikipedia.org/wiki/History_of_bitcoin then scroll down.

As you can see Dec 2017 reach the highest price of around $19k and the price dropped last December 2018 to around $3.3k so I don't think that $20k is the bottom price so there is still a big possibility that the price of Bitcoin this year will drop more. I'm not FUD it is just my own analysis based on Bitcoin price history.