If you are talking about un-ethical hacking then obviously the people you have ever been hacked are ought to be afraid,but until you haven't experienced this you will find it cool and interesting.

Their are two types of hacking:
1. Ethical(white hat) hacking: In short they provide security to cyber world. They hack things for good purpose.
2. Unethical(black hat): they steal someone's data for their personal gain and harm others.

My personal experience of knowing about the person who is a hacker(unethical) was a bit different, initially I found it interesting and really cool but after some time I realized this is not good and if you are caught then their are strict legal actions against you.

i'm still trying to get my share of onions to start participating in the airdrop but i see its rather hard for someone with not so many possibilities to invest with money. Every little thing seems to be done to compensate hold members and people in already better positions, which is ok, but hard for new members to start.

Micropayments also have the capacity to put an end to many of the problems the internet currently faces, like spamming. In the future, some of the services that are free – and constantly attacked by spam, like emails – could be replaced by making use of micropayments.
 Paying a fraction of a cent for an email wouldn’t bother most people, but for the spammers it would totally be a deal breaker.  Micropayments definitely have a huge role to play in the future, but how things will change because of this transition is not clear. In any case, in order for micropayments to prevail, adoption of cryptocurrencies needs to increase and that is only going to happen when people understand the possible applications and prospect that this technology offers.

JUST BE PATIENT 
Spending more money on a transaction is not always the answer for most people. The best option is often to wait until the transaction is confirmed through normal means. Granted, this may take up a lot of valuable time, but it is also a reliable solution. You can still use the other three options if the transaction is still stuck after 24 hours or longer.

According to Wiki, On 18 August 2008, the domain name bitcoin.org was registered. Later that year on 31 October, a link to a paper authored by Satoshi Nakamoto titled Bitcoin: A Peer-to-Peer Electronic Cash System was posted to a cryptography mailing list.  This paper detailed methods of using a peer-to-peer network to generate what was described as "a system for electronic transactions without relying on trust".In January 2009, the bitcoin network came into existence with the release of the first open source bitcoin client and the issuance of the first bitcoins, with Satoshi Nakamoto mining the first block of bitcoins ever (known as the genesis block), which had a reward of 50 bitcoins. Embedded in the coinbase of this block was the text:

The Times 03/Jan/2009 Chancellor on brink of second bailout for banks.

This note has been interpreted as both a timestamp of the genesis date and a derisive comment on the instability caused by fractional-reserve banking.

One of the first supporters, adopters, contributor to bitcoin and receiver of the first bitcoin transaction was programmer Hal Finney. Finney downloaded the bitcoin software the day it was released, and received 10 bitcoins from Nakamoto in the world's first bitcoin transaction. Other early supporters were Wei Dai, creator of bitcoin predecessor b-money, and Nick Szabo, creator of bitcoin predecessor bit gold.

There are many limitation of blockchains like: Complexity, Network size, Transaction costs, network speed, Human error, Unavoidable security flaw and  Politics. It has made cryptography more mainstream, but the highly specialized industry is chock-full of jargon. Thankfully, there are several efforts at providing glossaries and indexes that are thorough and easy to understand.

Efficient public transportation
Good, affordable national healthcare system
General attitude towards foreigners seems a bit xenophobic
Good cuisine
Use of Chinese characters in written language, similarities with Chinese cultures
Cherry blossoms
Giant hornets
Quirky TV shows
Robotics
WW2 Atrocities

As with any commodity, including physical Gold, bitcoin is subject to drastic price fluctuations. Between 2009 and the majority of 2013, the bitcoin price rose gradually from zero to near $200. The value of bitcoin then rose sharply to $1,242 in November 2013, nearly surpassing the price of Gold, which was trading around $1,250 an ounce, CNN Money reported. During the bitcoin price spike, dozens of websites launched to facilitate bitcoin investment. At the same time, bitcoin investing captured an enormous amount of attention in the media.

I find that the best tactic for tackling a panic attack is not to fight it. In my experience, the worst panic attacks I've faced were the ones during which I kept telling myself to "calm down." The panic attack is scary enough without you beating yourself up over it while it's happening. I find that a very effective way of dealing with the anxiety is to retire to a quiet room or area, even if the best I can manage is a bathroom stall. I allow myself to feel the worry, I give myself permission to be afraid. I tell myself that it will not be permanent, that it will pass, that everything is going to be okay. I breathe through it, and keep telling myself to breathe, to let the fear pass over and through me, and that everything will be okay.

Tell people exactly what you want them to do. Motivation is all about getting people to take action, so don’t be vague. Avoid generalities like, “I want everyone to do their best.” Say, instead, “I need you to come in over the weekend so we can get this project done on time.”

The one is eat healthy foods.  There is no magic diet that fixes depression.  It's a good idea to watch what you eat, though.  If depression tends to make you overeat, getting in control of your eating will help you feel better.  Although nothing is definitive, Cook says there's evidence that foods with omega-3 fatty acids (such as salmon and tuna) and folic acid (such as spinach and avocado) could help ease depression. And don't forget to get enough sleep. Depression can make it hard to get enough shut-eye, and too little sleep can make depression worse.

BTCitcoin is more accessible, with more exchanges, more merchants, more software and more hardware that support it.  BTCitcoin is far more liquid, with much larger volumes than every altcoin.  BTCitcoin has the largest developer ecosystem with more software and more implementations than any altcoin.  Bitcoin has the most entrepreneurs creating companies around it with a lot of intellect, dedication and creativity going toward making it more useful.

To prevent water pollution, the drains are required to be cleaned on a regular basis. In the rural areas, pucca drains are required to be made, because the water is going everywhere in a chaotic manner; it finally reaches the rivers and canals with tons of garbage and pollutants. We should develop a technology to keep the drains away from the water sources

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It is because if bitcoin or another cryptocurrency become widely adopted, the entire banking system could become irrelevant. While this may sound like a wonderful concept in light of the recent behavior of the banking industry, there are two sides to every story. Without banks, who will you call when your mortgage payment gets hacked? How will you earn interest on your savings? Who will provide assistance when a transfer of assets fails or a technical glitch occurs? While the financial crisis gave bankers an even worse reputation than they already had, there is something to be said for institutions that oversee timely, effective, and trustworthy asset transfers and their associated recordkeeping. There’s also the issue of the fees banks earn for the services they provide. Those fees generate a lot of revenue and a lot of jobs across the global banking industry. Without banks, those jobs disappear, as does the tax revenue those banks and their employees’ paychecks generate. Money transfer business would also disappear in a virtual world. Nobody needs Western Union or its competitors if everybody is using bitcoin.

Of course, there are also some huge challenges and concerns with this scenario. If bitcoin outpace conventional in terms of usage, traditional currencies will lose value without any means of recourse. Should bitcoin take over entirely, new infrastructure would have to be developed in order to allow the world to adapt. There would inevitably be difficulties with the transition, as conventional money could become incompatible quite quickly, leaving some people with lost assets. Established financial institutions would likely have to scramble to change their ways.

Ethereum is an advancement based on the principle of blockchain that supports bitcoin but with a purpose that does not compete with Bitcoin. However, the popularity and rising market capitalization of Ether brings it in competition with all cryptocurrencies, especially from the trading perspective. Currently, the market cap of Ether (ETH) is more than Ripple and Litecoin although it’s far behind Bitcoin (BTC). On the whole, Bitcoin and Ethereum are different versions using the blockchain technology, and are set to establish themselves, driven by different intentions.

Buy gold and invest it. Gold has demonstrated reliability. Civilizations have traded Gold since roughly 600 B.C. and it continues to be used by dealers and investors with great enthusiasm today. Gold is also sure to never lose its intrinsic value as a Precious Metal with numerous practical applications.

There are many benefits of bitcoin. The one is, quick and cheap transactions.

When making a Bitcoin transfer the fees are extremely low compared to conventional methods of moving money.  A normal Bitcoin fee is 0.0005 BTC per transfer, whereas with a typically international wire transfer you could expect to pay 700THB-1300THB per transaction.  Accepting credit cards will generally cost 3-5% of the transfer amount, which again is much more expensive than a Bitcoin transaction.

It is very safe, if you follow some basic security practices. Keep your keys secret, back them up (preferably in offline storage / paper wallet / hardware wallet), don’t keep all your money in a single wallet, keep all transactions within the blockchain, use multiple signatures in organizations in order to ensure a single person cannot compromise the funds, and have a plan to ensure that relatives can retrieve the money in the event of your death.  Blockchain technologies may well replace many centralized models that are currently used, while volatility in the BTC price provides challenges and opportunities. Bitcoin technology is not anonymous to organizations with enough resources to determine how funds initially entered or exited the Bitcoin network.