So In conclusion, I respectfully ask "what is your Effective Expert Advise for a Person (me) that has enough Salary but still want more Financial Stability using cryptocurrency".
To gain financial stability using cryptocurrency with your salary is easy.
Just be ready to take risk.
Set aside some percentage of your salary that you are willing to use in Bitcoin investment, use that percentage to buy bitcoin. It is called DCA method.
Keep buying bitcoin with the specified amount set aside from your salary for long, you will have financial stability in bitcoin because bitcoin is a store of value.