my investment
This is one of the big problems I see. Lots of people think Bitcoin is some kind of "investment scheme", it's not. Would you "invest" your money by depositing it into PayPal? Bitcoin is a replacement for PayPal. Use it just like you would PayPal. If you need to accept or send a payment to/from someone over the internet, then use bitcoin. Buying bitcoins to speculate on the value is gambling, not investing.
ps. I'm not blind, I was just speaking generally as I continually hear people refer to their bitcoin "investment".
Bitcoin has speculative value. Also people hold loads of different currencies. PP is an awful example for everything you've tried to compare it to Bitcoin.