If I have 21 btc, I would sell it now without thinking again now the price of bitcoin rise sharply.
nah dude if you are going to sell your bitcoin the price of bitcoin will going down because you sell your bitcoin the difference between sell and order is not the same , which is if you are going to order or buy bitcoin the price of the bitcoin are going up! and if you are going to sell the price of bitcoin will increase so that wee need more investors to choose bitcoin so that theres a chance that bitcoin price will increase.
Yes you got a big point there but remember when you make a sell order you can place a specified amount as on to the value of bitcoins. BUt what you said is true the only solution to make bitcoins price go up is to increase the buy order activities. So let us promote bitcoin more so we can earn more. So one way to increase it is by inviting friends and teach them about bitcoin and its benefits.
Indeed selling is the main thing in the growth of something, without selling a very good then it's growth will not be as good as with other goods. The promotion is the main steps in making a lot of people are interested in and use the bitcoin, however if we can not give a good image of the bitcoin. Then it's not going to make something good