The essential character of money is that you transfer it (or control over it) to another person in exchange for some object or service.
There is no way to use money to purchase something and still retain the money.
None of the alternatives are acceptable to you for various reasons
Invest money in a business and defer purchase until investment ...
Tax questions should largely be off-topic here, as they are so jurisdiction-specific. But nonetheless, a general answer is sort of possible here:
In many jurisdictions, you will be liable to pay capital gains taxes when you make profit buying and then later selling some asset. This tax is calculated when you report your taxes to your local tax authority, so ...
TLDR: The highest bidder on the exchange will get it.
One of the main jobs of an exchange is to match sellers with buyers. The exchange will help users sell for the highest price possible, and buy for the lowest price possible. If the price you want is lower than the highest bidder (buyer), the exchange will tell the buyer, "hey, we found someone that ...
AFAIK, if it is the same as stocks, then it is "The person who entered it first", meaning:
If somebody put in the limit order to Buy At $33,000, before you, then your $4000 will be matched to his limit order, but because he entered it first, then the transaction between you and him will be $33,000. That's the rule.
There are tons of buy orders to ...
Keep an eye on the tax in your country. In Germany for example you have to store Crypto on one exchange or wallet for about one year, so you dont have to pay taxes.
But if you just once traded crypto in that year you have to pay tax for the profit you made.
The first fifteen exchanges here are famous and credible. Choose one of them, open an account, verify your ID (KYC would certainly be required), add your IBAN number, deposit Bitcoin, sell it, withdraw it to your account.
Testnet coins are an interesting thing:
They are useful because they have no value
If they had value, they would be useless
Remember that the testnet is there to test out your code, and ensure that everything runs smoothly before you deploy that code to an environment which is holding actual value. That way, if something goes wrong, you haven't lost ...
You can use one of the Bitcoin exchanges and using their API, create something with the following logic:
current_balance = get_balance("BTC")
if current_balance > 0:
print("Sold %s" % current_balance)