It has always been about the price. People invest into Bitcoin with the hopes of turning a profit in the least time possible.
Yes, having profit in bitcoin investment depends when you invest and the percentage of Bitcoin depends on the value of bitcoin you invested, because in bitcoin the profit comes through the larger the value and smaller the value during any attempt of it's bullrun. The values is low like $50 and bitcoin experience bullrun the percentage of $50 investment can't be use to compare to the values of bitcoin $200 investment