The price of cryptocurrency will not be stable for at least two years. Why? Because there are still a large number of merchants and whales in control of the market, only coins can fluctuate to make a profit!
The current situation you feel lot of investors are control the market. But once it will legalised in some countries automatically it will growing to rapidly so don't expect it will take two years.
My prediction is we will see the good result in crypto market. Because number of companies are slowly adopt the Bitcoin so surely it will reach good position in next year.