I've understood long ago that bitcoin is a bubble, and that's where I'll get a profit by buying a cheap price and holding it until the price goes up, and I'm not going to make sales at such a cheap price right now.

Guys I think you missed the point here...it was clear sarcasm I don't think OP was actually suggesting we jump ship.

Hah!  I also assume the OP is sarcastic.  But one way think about the value of bitcoin is to look at how many people have it, and how many people will have it in the future.  Just for kicks, if everyone in the USA was given an equal amount of bitcoin, each person would get ~.06 bitcoin assuming all 21 million were mined.  Of course this leaves out the vast majority of the world's population.  realistically some people will own it eventually and some won't, but I believe we are nowhere near saturation.  So long as there are still vast numbers of people who do not own it but will, the price will go up over all.  Of course the price will always be subject to both negative and positive events.  The best strategy may then be dollar cost averaging, or buying a fixed amount at regular intervals such as $100 every week.  This ensures that no matter what the market does you get an average price.  But this strategy assumes a bull market long term, which I believe is the case, but anything can happen.  Don't put all your eggs in bitcoin because nothing is guaranteed!

First of all, we do not know if this source is really true or fake. So for me, I will still hold all of my bitcoin and wait for its price to increase again. It is really important for me to be patient because if not, I will lose a lot of money and I do not want to experience that. Im willing to wait for a very long time in order for me to gain profit.

What a nuisance this McGregor fellow, the OP. 
Your intentions may be pure and commendable but how you delivered it is not. Many of us members in this community (forum) do believe in what bitcoin and cryptos in genereal can do, and that is revolutionizing the how we understand and how market operates.
Of course projections for cryptos are low since this is a particularly young space in comparison to others. It doesn't necessarily show what you are advocating.

Sell your holdings, and never look back if it satisfies you. But don'r drag  the whole community with you.

Yeah..  I don't think so, if it was sarcasm OP wouldn't had added the infographic showing how small crypto market is. Maybe OP thinks if people sell now he can buy the dip  

Well, good thing I don't own any (I wish). 

that which you showed is just a prediction which can not be put in consideration. now that you are advising coin holders to sell off their coin off if after selling the one which they have it now turn back green are your going to pay them back for their lost.. me the best advice is for every one to minimize the rate at which they buy and concentrate on promoting the one they have already not selling it in this depreciating market.

I don't think BTC will go die. It's accepted in many places now and many people invest in BTC. If BTC die, maybe economic crisis occur.
In addition, BTC is new solution for banking and international transaction issue, although there is still problems with BTC, but people are working to resolve it. don't worry.