Bitcoin mining has always been the most effective method of gaining bitcoins. All you need is proper hardware, proper and right investment. But, mining doesn't sound easy as you think.
Bitoin mines in Iceland, one of the most coldest places of the world are the toughest place for mining. They need to be extra careful about what they do. And one wrong step can be fatal.
They are doing all this risky thing for getting bitcoins.. Its their love towards bitcoins. Its their passion for bitcoins.. This is a perfect way to tell how much btc is loved even in such harsh places of the world.

Bitcoins are equivalent to what we call money. And earning money is necessary nowadays. All of you, already know about bitcoins earning methods. But, if you want a method to earn bitcoins with bitcoins, then lending loans in bitcoins at certain interest rates is the best way.
You can earn some good money using it, and there's no chance of loss, if you make sure you are lending to the right person in legal way.

Bitcoins are so lovely and useful and user friendly, that they can never ruin your life. My life has helped me too much in my life, they have been a clear profit to me. They've been an awesome mode of cashless currency for me, and I can use it almost anywhere. Its easy, and fastest method of money for me. No hassle of stealing and all.

Here are the answers according to what I think.
No, your wallet doesn't save all the addresses generated. In fact, it only saves address of your wallets which are you using currently. Nothing other than that. These addresses aren't saved in blockchain either. But, if someone in the future gets this address then, yes it will be saved on blockchain's server.
And two persons cannot generate the same address offline, its merely impossible for this to happen..
Such a long string of Numbers and alphabets can never be exactly the same.

Bitcoins, which are now a very famous and useful currency over the world. But, guess what a Nobel laureate in 1999 had already guessed about a currency in which money can be transferred to any person without any third party's consent.
It was just a prediction of what can happen in the future.. And this has turned into a reality in the form of bitcoins. Isn't it amazing!

If you want to start your earning today, you can invest in bitcoins.
You can invest and start trading today.
In trading, you can exchange bitcoins with fiat currencies. And, as rate of bitcoins changes, you can earn profit too.
Also, if you have more money, you can invest today and start mining. Mining is the best and the most effective way of earning bitcoins yet.
But, investing can be risky too, if you get loss. So, think twice before you invest a huge amount.

The free method of learning BTC is farming faucets..
Bitcoinzebra.com is one of my trusted websites which I have used myself.
It can pay you up to 2000 satoshis at once.
All you have to do is visit there every hour, feed the zebra.. And that's it. You can check out when you have 5500 satoshis at weekend.
second is best one bitcointalk.org
its a database of bitcoin and other currency knowledge and here signature campaign pay us for valuable post.

It's a certain thing that no one will pay you huge amount of bitcoins for free. But you can do some tasks.
The method here is farming faucets. All you have to do here is do small tasks like visiting some websites, clicking somewhere, and keep visiting hourly or a few times in a day and that's it.. You will get a few satoshis for doing it. But, this method is too much time taking and less paying. So, people prefer trading and mining.

Donations are like a kind hearted movement by people.. Donating somewhere is a good habit. I have yet never donated anywhere in bitcoins. As I didn't still trust the communities present online.
The reason is some of them can be fraud too.
But, I'm sure if I have some bitcoins and at right time I'll donate it to a organization which helps the poor people.

Bitcoins wallets although say about maintaining protection. But, still experienced hackers can do something anywhere. If you're seeing pending or unconfirmed transaction. It means someone has sent bitcoins from your wallet to his own wallet and transaction is in confirmation process. If it confirms your wallet balance is gone. If it doesn't confirm by God's grace, it will stay there. You can't do anything here. Lost bitcoins are like stolen money.
The precautions always remain the same. But somethings happen no matter what you do. To protect your remaining coins, be cautious and keep your private keys . If you have multiple devices, you can keep your private key safe. So, even if you lose coins. You will lose very less.

Actually, I'm a little short on fiat currency right now.. So I cannot buy bitcoins at that time.
But, still I would like to tell reasons why someone would buy bitcoins.
(1) For trading-- Its a new way of earning through bitcoins now.
(2) For transactions-- bitcoin is a currency so obviously people will buy things from it.. And make transactions.
(3) For illegal things too-- Some people use it for gambling and negative things like ransom.

According to me, bitcoins halving won't be good. Here are the reasons I thik why.
(1) Bitcoins' users are increasing, so we need more supply, but halving will reduce it.. Which isn't good.
(2) Transaction fees still hurts people. What will happen if it increased? People will start protesting!
(3) less mining profitability-- Mining is heart and soul of bitcoins. If miners will get decreased. People's interest will decrease, which is unacceptable.

Selling and buying bitcoins. Normally termed as trading can help you get some profit too. You can buy bitcoins at a price. Wait for the price to increase and sell it to someone in need at your fiat currency. Make sure you follow these steps while trading:
(1) if you are buying bitcoins, make sure the person or community is trusted. Chances of scam are there.
(2) If you are selling, be sure that selling rate is always a bit less than buying rate. Be careful about that.
(3) Using tax free wallet can be more convenient.

Mining can seem difficult for a person who has never done it. But, mining depends on some factors. You just need some patience and some investment to start mining.
Here are the factors :
(1) Proper hardware with proper capability-- you won't get the best out of mining if your hardware isn't as powerful as it should be.
(2) Make sure you choose a perfect place suitable according to your needs.
(3) You have a proper wallet set up for your earnings.

Scamming in bitcoins happens very rarely though. But these precautions can help you be safe in such cases.
(1) Don't share your wallet address or private key without any reason.
(2) Use a protected and trusted bitcoins wallet. Blockchain and coinbase are most reliable.
(3) Always keep a backup of your wallet and keep backup file safe.. As someone may misuse it.

Bitcoins have been quite around since some time.. And as such , people are shifting to exchanging their money with bitcoins.
Now, in the world.. Generally people use bank deposits and consider it convenient. As such, acceptance of bank deposits by china BTC exchange will make it easier for people for exchanging as fiat currencies required physical meeting.. Whereas deposits in bank Can now be done from home..(though in some places you may need to go to bank). Now, so those people who are escaping BTC because of exchanging problems don't need to worry now.

sell all my Bitcoins for a party if bitcoin is declared official currency of the world...!
Bitcoins have always been my favourite because of what they offer to everyone -they connect the world with each other- .. I have always recommended everyone for using bitcoins ad the world is progressing , we need a technologically based money currency system too. Bitcoins are accepted all over makes it a major advantage too..but still proper recognition is not given to bitcoin all over the world. And if it gets the recognition it deserves... I'll certainly sell my bitcoins to throw a hard party!

Trading bitcoins can be a source of income too. Trading means buying bitcoins for fiat currency and then selling it to someone else in need at a different price. You can start trading any time if you have some bitcoins.
Rate of bitcoins is also upthrusting now so trading can be too much fruitful. You can buy some bitcoins today, wait for some time for price to increase and then you can sell it for profit.

To start your journey with bitcoins , you need some bitcoins. Buying bitcoins with fiat currency is not possible without meeting physically. So, buying bitcoins using credit card or debit card is the most suitable and safe option available. You can buy bitcoins from sites like 247exchange.com , Bithome.com
Buying with debit or credit card is also appropriate because it involves a record in your bank. So, you have a proof of transaction in case of fraud ! (Happens very very rarely though).

Bitcoins have gained success and popularity over the years. The world is progressing now. People are becoming now more and more tech-savvy. People are now considering doing anything wireless without physical movement. The same is what people want with currency now. They want it to be easy and tech-related. Bitcoins are the best choice for this generation and there's nothing waste of time in recommending it to family and friends. This will increase no. Of bitcoin users, aware people about it's benefits and make the world an easy place to live and a currency which can be used anywhere around the world.