Fiat cannot be replaced by bitcoin. Even in developed countries like US, people are not totally converted to digital transactions and fiat is used still.Most people in developing countries dont even have a bank account. They dont know how to use a credit or debit card.Indian government tried to convert people to digital transactions by demolishing high value notes and people suffer a lot there. So fiat cannot be replaced, but bitcoin may become as a secondary payment option.

Investing is making your money idle for gaining benefits in long term basis.Trading is investing money in a coin or shares aiming to get profits mainly in short term basis.In trading, you can switch your investment to any coin or share based on market situations.Trading involves risk.Example for investment is investing in gold. Trading can be done by investing in bitcoin or in any altcoin.

I hope Bitcoin price would be much higher since there will be no bitcoins remaining to be mined at that time. But there would be a huge demand for bitcoins increasing its price.People would hold bitcoins in their wallets like gold.All these would only happen if bitcoin survives quantum computing which is said that it would break block chain system.

Trading is the best source.You can start trading even with 0.1 btc.The only condition is that you have to know about basics of trading and investing in altcoins gives more options to earn bitcoin.Other options like cloud mining has mostly turned to be scam. Gambling would make you to even loose your total investment.

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Bitcoin has changed my lifestyle.It has given me a new earning opportunity. I could send my earnings from abroad to my home quickly at lower cost. I recharge my mobile using bitcoins. In short, it has made me financially independent.

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I think it would be around 25 to 35 age people.These age people have more responsibilities for developing their families and at the same time, they search more sources of earning.So obviously, most of them come across Bitcoin and start using Bitcoins.

Bitcoin was mainly created to save people from banks and governments,to make them financially independent.Banks and governments tried a lot to destroy Bitcoins, but couldnot and Bitcoin has survived and is acheiving the objectives for what it was created.

I use to put half of my income into Bitcoins.I save small earnings which i get from signature campaign and invest them in trading.In future, i have plan of investing more in Bitcoins.