If you have a decent know-how on oil industry, I see no issues in starting your own business and generating revenue through it. It will be a safer destiny for your money, considering Bitcoin can be quite volatile sometimes, especially after the peak of a bullish market. Moreover, it doesn't mean the end of BTC investment for you, as you can continue investing in BTC as your business returns you profit.

I also think you will feel more self-realized as a businessman than as an investor, because it's rewarding to build something with your own hands, and see it bearing fruits after a while. Just make sure there will be demand for what you are going to produce, so you don't get frustrated with a lot of supply without having where to sell your goods later.