If everyone will keep on holding their coins without spending then how can you expect higher price of bitcoin? You should play with it regularly to earn regular profits.
If we hold the coins only and do not spend the coins, it means the coins are useless, so it is also valueless.
useless it's meant the coin will idle on the wallet but if we all bitcoiners hold your coin on wallet it will impact to the price rising.
it only has an impact as long as there is still a demand for it and people are willing to keep up the supply. There has to be some movement within the Blockchain and not everything can be held back. If no-one wants to sell, and no-one wants to move the Bitcoin, then there is no demand and no-one wants it anymore, which is detrimental to the currency.
There will still be demand because there will still be people working for bitcoin and earning bitcoin. They are the one who will make the demand. Employers who pay their employees will have to buy from miners. And even if those employees hold their bitcoins for investment, the demand from employers will be enough. And bitcoin is mostly psychological demands. If people keep talking about the future of bitcoin and how high the price would be, it will still create demand and high price.