People will stop with Bitcoin if they think that they cant earn some profit with it, or if they lost a lot of money with it and that is really bad, the people that is stopping so early dont have patience and that is not good.
To make some profit with Bitcoin is patience a really important role in Bitcoin, without patience you cant make profit with it.
Yes, people who adopted and have to hold bitcoin for long time because of its price increase and earning with it will definitely make more difficult to get back same amount of bitcoin and they will never come back again to earn in bitcoin, I too believe.