Definitely yes, and that is the reason why the bitcoin bubble prophecy is created. Like a bubble bitcoin price can grow as much but would burst when it reach it's limitation. When time comes that people lose trust to btc future as investment to yield huge profit and not consider buying lot of btc anymore then it would be worthless.
Certainly i agree, if more people doesn't have any interest on bitcoin then possibly happen next is there is lot of selling than buying, so a lot of supply than the demand until it reaches it smallest value as its value drop into smallest then more people will get uninterested to bitcoin and i think that is the time that bitcoin value become worthless.