I plan on using some of my bitcoin on investment and some of them i would sell for money... I wont keep 100% of my investment in bitcoin because it still risky due to the volatility of the price..
I will still be earning from the mining that i did
Yes of course, investing in bitcoin a hundred percent is not really good. As you say bitcoin price is not stable thus it is really risky. If I have a good amount of bitcoin like you, I may exchange my bitcoins to cash and invest on buying stocks. I would also try to have savings account on a bank and buy some mutual funds. Continue to do the old way to earn with bitcoins like trading, investing, and posting.