Anything unnatural will not sustain for longer time frame, right? Bitcoin is almost 12 years old and its value is on upward direction among big to small corrections in this time frame. Consistently having value into upward direction artificially is definitely 100% impossible in this modern era. People are having all the resources to verify and to double check in this 21st century. So, bitcoin must have got all the reasons to value. It may be higher due to speculative but when demand also increases then such higher value also becoming reasonable. It is kind of cyclic event that higher value happens first and then bitcoin gets equivalent or higher demand which in cycle induce again higher prices.