I am glad that people here can see that at age 47 someone is accepting bitcoins, prove that as we talk to the young about bitcoins, the old should not be left out. 

You are never too old to invest in bitcoins. IMO at age 47 you will be more focused to invest and hodl than a very young person who still has distractions and unnecessary things they want to spend on due to pressure. At age 47, so far as you as you are still willing to learn, you have no problems.