Some projects ask for gas to prevent people with multiple accounts from participating because the multiple account users won't want to be sending small gas from all the wallets they used for the airdrop/bounty.

That's right, some even go to the extent of not listing their tokens on their own platform then they will put a very high withdrawal fee for people who want to withdraw and trade it elsewhere.

If i have been using new emails for every site i signed up on i would be having hundreds of emails already and that's a very bad idea, i would even be having the issue of trying to remember which email i used for which site.

The best way to safe your private key is offline, make a hard copy written down on a piece of paper or in a private book
I would recommend a well known offline wallet like Atomic wallet, electrum or myCelium

A platform that promises you 50% of your investment daily is obviously scam you don't need anyone to tell you that and the fact that they used the name of a well known company (Coinbase) is another flag for you to know that it's pure scam even paying HYIP's won't tell you 50% daily.

Investing is the act of buying an asset or group of assets in hopes of getting profit sometime in the intermediate to distant future while trading is the act of buying and selling of an asset or group of assets in hopes of making profit by taking advantage of the increase and decrease in price of the market.

You don't need to install any app before you can be able to trade on exchanges except you want to download the official app of the exchange, you should be safe as long as you use a very strong password that you haven't used before and also make sure you activate 2FA.

I have never lost bitcoin due to wrong address because i usually scan Qr codes to send bitcoin or i copy & paste addresses when sending bitcoin and other cryptocurrencies. i also cross check the address before sending because we can't be too sure, there might be a malware that changes your copied address on your device.

There is no law that explicitly prohibits Mixers which means that they are probably not illegal it depends on if the funds you are mixing is illegal or not.

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It's probably just a malware that replaces copied addresses with that of the hacker, you can avoid this by turning off auto-download on telegram and by not downloading unknown files/softwares and don't forget to double check the addressees before clicking send.

Cryptocurrency has created lots of job opportunities and it has made global payments faster, easier and more reliable.

If you are talking about if someone send more than the amount you requested for using the generated QR then you will receive all the funds to your wallet.
It depends on the wallet you use, some wallets changes your public key very often and some lets you use only one specific address.

Investing in bitcoin is not a mistake all you need is to be patient and you will never regret it.

If a project say that they don't charge any fee then they might mean that they won't charge any fees for a specified period of time or they might have a subscription package or they might even have another way that they use to generate their income.

They used the word "Imagine it the value of paya will go up to $1000" emphasis on the word Imagine meaning it's a speculation.

Since they are all stable coins backed by Us dollars then there should be no preference since they're all the same but it will be advisable to go for the most popular and used ones like Usdt and if the exchange doesn't have it then go for another well known stable coin.

Faucet are reward systems that dispenses rewards in the form of a tiny fraction of coins (in your case Ltc) for visitors to claim at certain time intervals which is paid to your real litecoin address.
Yes, if the faucet actually paid you then you should see the transaction and you should eventually receive it on your wallet.

Move this topic to the services section of this forum then update your post to include your portfolios, you should also create an account on sites like freelancer, fiver upwork and many others to increase your chance of getting a job.

Scanning Qr code is the best way to avoid sending to the wrong address and copy/paste of the address is also a good way as long as you don't have any virus on your device that can change the copied address that's why it's advisable to always confim the address before hitting the send button.