This is the state of the market, my friend, there is no currency that is constantly rising without falling. There is a fixed rule in the world of trading that there is a drop or correction after every rise and this is similar to the principles of physics because every action has an equal and opposite reaction in the direction, so it is natural for there to be Strong fall after every strong rise. You have to take advantage of this opportunity, monitor the market, buy at a good price, and then sell at the highest level.
As for your other question, there is Bitcoin that achieves this feature that you want because it is halved every four years, which leads to a constantly decreasing supply and an increase in demand, and this leads to a constantly rising price.
We should really accept into our mind that this is how market works and it wont be called a market if it would be having a continous price movement on going up because everyone would really be getting rich in that case.
Consider out that a particular market is really been composed by sellers and buyers and we cant really be just having that buying situation all of the time.There would really be a point that people or investors would
be selling their assets. Just like on what others been saying that as long there would be a demand then we could really see potential rise of price.