You took that thing absolutely wrong as Bitcoin will never give you profit if it gets stable. Just imagine, for whole year the growth is nearly 2-3% then how will you earn profits. This is the risk of getting a stable system, things stop to grow at wild rate. Instability in the system is only making people richer and poorer at the same time because of good and bad choices, some people sell at low and gain loss other sell at high value and gain profit. This is the circulation of money and working of things.