This is not a question. It is a statement that is not backed up by any facts. Assuming are asking is the number of cases are expected to increase the answer is yes for these reasons.
1. The population is growing, thus allowing more people to get the illness.
2. Many years ago what we called senility was probably Alzheimer's.
3. People are living longer. Thus, we are seeing more of the severe cases than we use to see.
4. We are diagnosing the disease earlier. Some medications and brain exercises can slow the progression, but the disease still exists.
My mother-in-law has Alzheimer's. My wife and I have done a lot of research and have watched how the disease and progressed.