I believe there are a lot of answers to such question but as for me, I believe the people who have faith in bitcoin and other altcoins drives its price up and down. If more people learn of it and how to use it, the price will go up. Given there is FUD, the price is down. Most of these are driven by a group of people most of the time because they want new entries to the markets.

The independent individual as an option is not getting better than government. The rich owners called the whales are now the main manipulators, they are the unexpected problem and new crypto government.
 
The only drive should be the demand and supply but until this year, the demand has been maintained and the price falling.  If the demand increases and the seller provide a lower price compare to market, it creates panic. This result in lower price order by buyer, this is the pattern of manipulation.

Most often I think? But right now the institutional are here and they will buy bitcoin as much as they can then sell those accounts to their clients. Actually im more realistic in the bitcoin price after 2 yrs coz price could change from it current standing. We're lucky that we are accumulating at this price.

not. As far as I know, the one who can drive bitcoin is the person who is not an individual or one person. because if more and more users are using bitcoin, then the faster bitcoin will experience price increases

Yes bitcoin is being driven by us the end users and as a community the progress and fall of bitcoin lay with us our activities and at that since there is no body that regulates the activities of bitcoin since it a decentralized commodity, and at that it operate on the economic law of demand and supply.

Bitcoin is indeed difficult to control, which drives Bitcoin is an efficient and effective system and guaranteed security so that bitcoin is interested in by various circles from the community and from the institution's point of view that greatly encourages bitcoin.

Individuals who are related directly or indirectly to this market, drives the Bitcoin market.We all know that the price of Bitcoin depends upon it's demand and here demand is the number of people buying and selling .So with an increase or decrease in the demand the price increases or decreases which means that definitely the individuals have a large role in driving the Bitcoin market.

The people, the technology, the demand and the supply.

Those are the factors that drives bitcoin's value and yes you and I are part of those factors. It's worthless if there's no adoption and you can't use it in real life although most alts has its own price but doesn't have real use case and bitcoin is different from those.

It has its market cap that has the biggest share in the crypto market which has been contributed by us.

Bitcoin is not the same as fiat money. Bitcoin attracts more people because of being decentralized and digital yet the value is not stable more and more people are engage on it.  The more people who use bitcoin  the more to increase it demand and supply.