This is very true as the price of bitcoins just seems to be going higher and higher which means it will reach a point as all currencies do where it will either stop increasing or degrade.

not really, as long as the demand for something is increasing the price of that thing (which also has a limited supply) will increase and when a balance between the supply and demand of that thing is settled, the price stops increasing and starts becoming stable.
if that balance is broken, meaning the demand decreases the price will go down and if the demand increases the price will go up.