Bitcoin wallets are protected with passwords for more security, you can even take a backup of your wallet in .dat format if you ever need it. But, a problem can arrive if you lost the password.
Hopefully,  you don't actually need to worry much as there are some scripts which you can perform on your PC which can take out the password from .dat file. This can save your wallet and your life actually, simple googling will get you many of these scripts.
But, it is recommended that you always remember your wallet password for being hassle free.

Effective methods have been found, but still there are some flaws in bitcoins which are like risky for bitcoins.
(1) Hackers have developed some new techniques for gaining access to wallets, no matter how much secure bitcoin wallets have been, still it's got some loopholes which are not tackled.
(2) There is some insecurance too if you forgot your wallet details and you don't even have a backup.
These risks are harmful for the currency and should be took into consideration.

Bitcoins , though being an awesome currency are still not considered to have a place on the mainstream line. Here are some of the reasons for it.
(1) It is still not used widely , many people are still not using it as being used less in their territory or country.
(2) Bitcoins still don't have any official management community, this creates problems for the people as scams and frauds are getting increasing and there's no official community to look after it.

Rate of bitcoins is not same always, it keeps on changing in a few days and even sometimes many times in a day. Inflation of deflation of Btc rate is important because of these reasons.
(1) As time is progressing, worlds economy and economic development and condition is also progressing, hence btc should be running parallel to it.
(2) Inflation and deflation in rates is also important for increasing people's profits as of course people won't use bitcoins much if there's no profit. So, inflation with time is important and necessary.

Bitcoins, even though being cashless, wireless and a globally accepted currency, still people have doubt on it's working method. And, that's why maybe some people even though knowing about btc, aren't using it. Some of the reasons are.
(1) Bitcoins are still not famous in their country and has very low attention
(2) Rate of bitcoins in their fiat currency is not ok for them.
(3) They still have doubt on privacy as bitcoins work on a system of bitcoin address and private keys of transaction.

Bitcoin's effectiveness and simplicity is now getting famous and popular. Also, many countries are now changing towards getting cashless and here's an initiative by Switzerland government which will stand a huge step in bitcoins evolution. They have removed any VAT on using bitcoins in their country. This will definitely give a boost to the usage of bitcoins in Switzerland and hopefully other countries may even learn from this step and bitcoins may get progressed in other countries too..

Investment in btc is a personal choice for everyone. Everyone has a reason for investing. . Investing in btc can be profitable and may be a loss at the same time. . Here's why
(1) Prices of btc keep changing according to in ratio of other fiat currencies-- prices sometimes get a hike and a downward hike.
(2) Losing backup of wallet and forgetting password can be bit harmful too.
So, according to my opinion, you should invest in btc, but investing a whole1 btc may be risky ..so invest a little, and when you're sure, go ahead.

The prices of btc keep on increasing and decreasing regularly accordingly as we can see. But, the supply of money is to be maintained as same. The changes in prices whether increase or decrease can give a big profit or loss to the person. Here's why
(1) You buy one btc today for 24000inr and then btc price decreases, you are certainly in a loss. You can be in profit too on the reverse case.
The differences in prices of different currencies isn't uniform too,e.g. 1btc is 328us$ and also 24,000inr. But ,328us$ isn't equal to 24,000inr.

Bitcoins as a currency has seen a tremendous development in the past years. It's no. Of users has increased by a large margin. People have different reasons for using bitcoins. Major ones are:
(1) They are waiting for hikes in btc prize, so that they can sell their btc and earn profit.
(2) They're doing faucets--  Lol , they pay not at all, but some people do use faucets in btc and earn some small amount.
(3) A few people even use it for buying and selling things. I, myself don't buy because it's used very less in India, but many others do.

You can grow your bitcoins by doing these things.. :
(1) Start an online service and provide donations via btc-- If you have an available server that you’ve been renting for other purposes anyway, you may want to consider starting a useful online service that visitors will keep returning to, where you can then solicit donations via Bitcoin.
(2) Sell your items-- Start your own business online and do transactions using bitcoins
(3) Farming Faucets-- They are too miser in paying, but they can at least give you something for doing absolutely nothing.
(4) Publish online ads-- You can earn by publishing ads on your blog or website. Some websites like CoinURL and BitClix pay you in btc for ad clicks!

Bitcoins is a global currency, no doubt about that. It can be used in any part of the world. Exactly, any part in this world. But, still it is not so much famous in many countries and in some countries, people don't use it at all.
But, still as an estimate there are about more than 6-7 million people across the globe using it. It's used by people in majority in USA, UK and even Australia. But, btc is expected to expand in upcoming years.

Btc is an incredible online cashless and wireless currency. It's a currency so can be used for buying and selling, I would prefer bitcoins Because
(1) Gold is a costly item, but bitcoins is a currency and currency can overcome anything
(2) You can buy gold using btc , but you cannot buy btc using gold..It's a thing to always remember-- BTC is a currency, but Gold is not!
(3) You can buy things using btc, but buying through gold isn't possible, gold can give you btc on selling, but btc can't.

Earning in btc is still not as simple as you think. There are many methods though for earning in btc, but they are not enough. Faucets can pay you too but, they pay very low and using them can't ever give $1 in btc. Buying an investing is a time taking thing. The only option remaining is bitcoin mining. It needs some typical hardware but it's only effective high paying method.
You can buy hardware For it online on various shopping sites too.

Bitcoin has become global currency in the world, it's used in many countries now, like in USA, UK, Australia, you can even buy chocolates in UK using btc..
Bitcoins have been accepted globally because of their simplicity, their ease, their security, their originality and security.
Bitcoin was designed specifically for the internet, and the result is lower fees, less fraud, and an open payment system with free competition.    in the coming years will be transparency, openness, convenience, and price.

Mining is an effective way of earning bitcoins. But people have quit it because of following reasons
(1)Low acceptance-- Unless you’re planning on exchanging your bitcoins into other currency, you’ll need to look for shops which accept bitcoins for currency. All of the shops or other places which do accept bitcoins will be online I have yet to hear of a brick-and-mortar store which accepted  them. While online commerce isn’t the issue, the relative number of bitcoin-friendly stores is very small.
There are only a few credible online stores, and then sites like Reddit and WordPress that accept them for payment. Otherwise, you’ll have to switch it to traditional currency, which sort of defeats the purpose of bitcoins.
(2) Unstable value-- Another one of the biggest disadvantages of bitcoin mining is the fact that the value of bitcoins can fluctuate. While it’s true that all currencies fluctuate in value, bitcoins appear to be a lot more unstable compared to trusted currencies like the US Dollar or INR. In fact, bitcoins can deflate in value whenever people seem to put less trust in it or if a technical glitch occurs with the system or bitcoin exchange markets.
It can range anywhere from less than $5 per bitcoin to its current high value to far beyond. The value should stabilize if more people use the currency, but that trend is going very slow.
(3) Lack of Protection-- Since there is no central organization which controls bitcoins, there’s also no form of protection when dealing with bitcoin transactions. If you want buyer protection, you won’t have any with bitcoins. If you want your bitcoins to be insured like money is in banks, that doesn’t exist.
If you happen to lose your bitcoin wallet by accidentally deleting it, wiping your hard drive, etc., and have no backups, then your bitcoins are gone. Stuff happens, so while the chances of actually losing your bitcoins is rather low with regular backups, technology can still break.

Bitcoins have been looked upon by people with different views, some think it as positive and an effective powerful global currency. But, some people have negative views and they stopped using btc and dumped it. I'll try to clarify the reasons here.
(1) They invested and they got huge loss-- there are some people who invested in bitcoins and got a huge loss, they're feeling like cheated now , so they dumped btc.
(2) In some (maybe many) countries, btc is still not much used as it should be, so people think using btc is waste.
(3) No matter how much we say about security, btc is still not looked as secure by people and it's a reason for them directly dumping it.

I'm pretty sure that we would be much better off if we had a dynamic block size limit (with the correct parameters). BIP101 is probably too big, and 12.5% YOY might be too low, both of these would eventually cause issues. It is still a hard cap which can't be changed without another fork. If we had a dynamic block size then we would not need to worry about this (unless someone tries to game the system).
I've always been against making pointless predictions as we can not know what is going to happen in the future. We can't expect any fixed
solution to be the right call.

Bitcoin is better than fiat (cash) because of the following reasons
(1) It's wireless-- means It's not like cash which you will keep secured in your locker. It's a wireless currency, it's in your wallet always without any doubt.
(2) Payments can be done from anywhere-- In cash there's a problem that you can only pay to the person when you're face to face, that is in Front of each other, but bitcoins can be transferred from wallet to wallet from anywhere, anytime.
(3) It's available everywhere--  cash cannot be available at multiple places at same time, but btc wallets can be used by multiple persons on multiple devices, so it's wherever you go.

Situation of btc in India is still not good. Here's a brief description along with the reasons why it is so.
(1) Very few people know about it. Lack of knowledge about bitcoins is also a major reason for it's less use.
(2) Even though the people who know about it are using it very less, and not at all for buying or selling.
(3) People still prefer cash a better medium and it's being used thoroughly.
I hope this situation changes with time.

Bitcoins are always known for their simplicity and ease. Here's my prediction about it in the next 10 Years, if it succeeds.
(1) Cash will be getting vanished-- People will use cash very less or not at all. We'll progress towards being cashless.
(2) Bitcoins will be accepted globally-- So you'll not have to convert your currency when visiting any other country.
(3) More secure and portable-- Btc is more secure and portable than cash, so world will have stronger security.