This is going to be final phase that can give more fortunes. Many life time positive events / subha karyas will happen even if you are running weak maha dasa. Make sure to utilize this time to settle down in your life very well in each and every aspect of your life. You would reach a big milestone on your personal life as well as career.
It is better to move your excess money into diversified portfolio like buying conservative government bonds, invest in real estate properties in different locations, buying whole life insurance, etc. You also need to come out of stock market trading going forward, or look for your natal chart for further options.
If you are doing small business, you can take a safe exit now with excellent profits. Going forward, you need to have favorable maha dasa to run the business or include the family members who is running favorable maha dasa.
Do some charities in Sep 2017 to protect yourself from the start of Sade Sani from Nov 2017.