Bitcoin value will continue to go higher in the years to come because in every year there are new people adopting Bitcoin and crypto currency generally and that will make the demand curve higher than the supply curve which simply means price will keep on going higher as years go.
when demand increases, the price of bitcoin will automatically rise by itself, so in the years to come the development of bitcoin will continue to be in demand, basically bitcoin is an investment that people expect, it's just that people are constrained by the purchase price, so making bitcoin is an upper middle class investment , and this condition is a scientific pattern that society continues to practice, when demand increases, bitcoin adoption is increasingly valuable.