Many of ICOs allocate some of the tokens to participants in bounty campaigns. Don't you think it is better to give bounty participnats reward in ETH?
1-2% of the money raised is not so much and bounty participants deserve that. Also, it can cause more investors to attract. Because they are no longer worry about the price fall after bounties are paid.

Some investors have sold whole bitcoins in exchange for a lot of different altcoins. They probably lost confidence in bitcoin because the price of bitcoin in the past six months has been falling continuously

of course, we all see that all markets are red and there are some fears of getting down more and more in the following days. but on the other hand, no one can ignore that bitcoin is the leader of all the crypto market, so if it down the whole market will go down as well, so it is too hard to believe that it will die that easy
and the major investors of it will not allow this to happen.
what do you think, am I right?

Depends on what price they sold, if they sold it 1900 dollars, they are still good. But if bitcoin continue its rise then they are really in for a big loss.

Do you think Bitcoin will become the first world currency for buy and sell ? 

A gloomy day with crypto market, red overflowing bulletin board.
I think this is a difficult time for investors because the law is changing day by day. But for those who want to hoard this is a good opportunity to buy.

I know some of you would wonder what this topic is doing here, in the Economics section, but since it is in fact an economic question with purely utilitarian goals in mind, I think it is where it should be. This is a serious question and I'm not kidding. I'm not very interested in European languages like German or French, or whatever, as I think languages like Chinese and Japanese are more promising and rewarding in terms of both usage and money in the nearest future. Personally, I'm more inclined toward Japanese (that's why I'm not decided yet), though I understand that Chinese may be a better choice for the time being and years to come

So what is your opinion on this matter from an economic point of view, with crypto in mind?

It's true that many hackers used to be the world, but we can also use 2FA security or we could store our bitcoins in a nice and trusted market wallet that has good security.

I think as a beginner its better to invest small amount while learning about things. Because practical knowledge is better than theoretical.

if you want to make x100 i think you should invest in ICO.

look at ico with low supply and low market cap target ideally under 1 million dollars.

So lets say I put in $100 dollars. I buy while its at a low of $10,400. The price goes up to $10,400 and I sell. Whata my profit?

If 80% of citizens are using crypto's, this might be a huge increase on the sales of every business and it can help boost the economy. Always remember that everything we purchase has tax, so we are unintentionally paying it regardless on where our money is coming from. Same thing goes for crypto currency earners. Also if 80% are using crypto, I think the best way of applying taxes will be on exchanges.

As for now btc is constant on 8 to 10k $ and it will take too much time now to reach its peak of above 20k $ per bitcoin and the fact is no one can guess when it will grow that much in upcoming time may be next year or after 5 year but all believe it will cross 20k $

but did u guess last time right and sold all ur btc at 20 k $ cause me sold it that time and buyed after 1 month on 12k $ peak luckly me guess it right

The reason why there has been a serious insurge of people into cryptocurrency mostly populated by newbies and novices is because someone somewhere told them they can make 100% to 500% in crypto within few days, lol but how many really had such experience.
The worst still is that some don't even think learning is necessary in the crypto market, and so they just invest their money in crypto and manage to know how to open and close a trade, and as soon as any candlestick chart turns red they dash their coins into the market in fear to cut off more loss and the cycle continues till nothing is left.

If you are doing this at the moment just quit crypto trading its not for you.

We should trust our experience in trading even though the situations got worst, and I don't think panic selling is the solution. What will happen to your future profit if you sell it all due to you're panicked? That's why we should stay stronger and keep the faith burning so we could stand against negative speculators.

Hello! I think for the new year Bitcoin $22000; ETH $780.
What are the forecasts?

According to me, ETH, NEO, BNB, ADA, ETC ... can invest long term because it has great potential for development. 

Snap up opportunities that presents itself. Have a specific profit % that can be raised or lowered depending on how propitious the trade is. For me, you can be greedy but always be logical